├── .gitattributes
├── .gitignore
├── CHANGELOG.md
├── LICENSE
├── OSSMETADATA
├── README.md
├── build.gradle
├── codequality
└── checkstyle.xml
├── gradle.properties
├── gradle
└── wrapper
│ ├── gradle-wrapper.jar
│ └── gradle-wrapper.properties
├── gradlew
├── gradlew.bat
├── images
├── Prana.png
└── Prana_Small.png
├── sample_config.properties
├── settings.gradle
└── src
├── main
├── java
│ └── com
│ │ └── netflix
│ │ └── prana
│ │ ├── Main.java
│ │ ├── MainModule.java
│ │ ├── config
│ │ └── PranaConfig.java
│ │ ├── http
│ │ ├── Context.java
│ │ └── api
│ │ │ ├── AbstractRequestHandler.java
│ │ │ ├── DynamicPropertiesHandler.java
│ │ │ ├── HandlersModule.java
│ │ │ ├── HealthCheckHandler.java
│ │ │ ├── HostsHandler.java
│ │ │ ├── NIWSCommand.java
│ │ │ ├── PingHandler.java
│ │ │ ├── ProxyHandler.java
│ │ │ ├── SimpleRouter.java
│ │ │ ├── StatusHandler.java
│ │ │ ├── UnicastDisposableCachingSubject.java
│ │ │ └── Utils.java
│ │ ├── internal
│ │ └── DefaultContext.java
│ │ └── service
│ │ ├── EurekaHostService.java
│ │ ├── HostService.java
│ │ └── ServiceModule.java
└── resources
│ ├── config.properties
│ ├── log4j.properties
│ └── prana.properties
└── test
└── java
└── com
└── netflix
└── prana
└── http
└── api
├── AbstractIntegrationTest.java
├── DynamicPropertiesHandlerTest.java
├── HealthCheckHandlerTest.java
├── HostsHandlerTest.java
├── PingHandlerTest.java
├── StatusHandlerTest.java
└── TestUtils.java
/.gitattributes:
--------------------------------------------------------------------------------
1 | /gradlew text eol=lf
2 | /updateWrapper text eol=lf
3 |
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/.gitignore:
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1 | # Compiled source #
2 | ###################
3 | *.com
4 | *.class
5 | *.dll
6 | *.exe
7 | *.o
8 | *.so
9 |
10 | # Packages #
11 | ############
12 | # it's better to unpack these files and commit the raw source
13 | # git has its own built in compression methods
14 | *.7z
15 | *.dmg
16 | *.gz
17 | *.iso
18 | *.jar
19 | *.rar
20 | *.tar
21 | *.zip
22 |
23 | # Logs and databases #
24 | ######################
25 | *.log
26 |
27 | # OS generated files #
28 | ######################
29 | .DS_Store*
30 | ehthumbs.db
31 | Icon?
32 | Thumbs.db
33 |
34 | # Editor Files #
35 | ################
36 | *~
37 | *.swp
38 |
39 | # Gradle Files #
40 | ################
41 | .gradle
42 |
43 | # Build output directies
44 | /target
45 | */target
46 | /build
47 | */build
48 |
49 | # IntelliJ specific files/directories
50 | out
51 | .idea
52 | *.ipr
53 | *.iws
54 | *.iml
55 | atlassian-ide-plugin.xml
56 |
57 | # Eclipse specific files/directories
58 | .classpath
59 | .project
60 | .settings
61 | .metadata
62 |
63 | # NetBeans specific files/directories
64 | .nbattrs
65 |
--------------------------------------------------------------------------------
/CHANGELOG.md:
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--------------------------------------------------------------------------------
/LICENSE:
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/OSSMETADATA:
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1 | osslifecycle=archived
2 |
--------------------------------------------------------------------------------
/README.md:
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1 |
4 |
5 | []()
6 |
7 | 
8 |
9 |
10 | **Prana** - Making it easy to integrate with NetflixOSS services. Prana exposes Java based client libraries of various services like Eureka, Ribbon, Archaius over HTTP. Prana makes it easy for applications—especially those written in Non-JVM languages—exist in the NetflixOSS eco-system.
11 |
12 |
13 | ## Build
14 |
15 | We use Gradle for building
16 |
17 | ```
18 | ./gradlew build
19 | ```
20 |
21 | We use the standard Gradle application plugin to build a deployable artifact of Prana
22 |
23 | ```
24 | ./gradlew distZip
25 | ```
26 |
27 | ## Documentation
28 |
29 | Please visit the [wiki] (https://github.com/Netflix/Prana/wiki) for detailed documentation.
30 | Please open a GitHub issue if you feel the current documentation is not clear or needs more explanation.
31 |
32 | ## Contributions
33 |
34 | Please use the [GitHub Issues] (https://github.com/netflix/Prana/issues) for requests.
35 | We actively welcome pull requests.
36 |
37 | ## License
38 |
39 | Copyright 2014 Netflix, Inc.
40 |
41 | Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0
42 |
43 | ## Current state of this project
44 |
45 | The current implementation of this project is not used internally at Netflix and therefore updates to the open source have been slow. For more context, see http://ispyker.blogspot.com/2015/10/towards-being-better-about-open-source.html
46 |
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/build.gradle:
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1 | plugins {
2 | id 'nebula.netflixoss' version '2.2.10'
3 | }
4 |
5 | group = "com.netflix.prana"
6 |
7 | repositories {
8 | jcenter()
9 | }
10 |
11 | apply plugin: 'java'
12 | apply plugin: 'application'
13 |
14 | sourceCompatibility = '1.7'
15 | targetCompatibility = '1.7'
16 |
17 | dependencies {
18 | compile "org.slf4j:slf4j-api:${slf4j_version}"
19 |
20 | compile 'com.netflix.ribbon:ribbon:2.0-RC9'
21 | compile 'com.netflix.ribbon:ribbon-eureka:2.0-RC9'
22 | compile 'com.netflix.ribbon:ribbon-transport:2.0-RC9'
23 | compile 'com.netflix.karyon:karyon-governator:2.1.00-RC5'
24 | compile 'com.netflix.karyon:karyon-eureka:2.1.00-RC5'
25 | compile 'com.netflix.karyon:karyon-servo:2.1.00-RC5'
26 | compile 'com.netflix.karyon:karyon-archaius:2.1.00-RC5'
27 | compile 'com.netflix.karyon:karyon-admin-web:2.1.00-RC5'
28 | compile 'com.netflix.blitz4j:blitz4j:1.35'
29 |
30 | compile 'com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:2.3.3'
31 | compile 'com.fasterxml.jackson.core:jackson-core:2.3.3'
32 | compile 'com.fasterxml.jackson.core:jackson-databind:2.3.3'
33 |
34 | compile 'args4j:args4j:2.0.28'
35 |
36 | testCompile 'junit:junit:4.11'
37 | testCompile 'org.mockito:mockito-all:1.9.5'
38 | }
39 |
40 | test {
41 | testLogging {
42 | exceptionFormat = 'full'
43 | }
44 | }
45 |
46 | run {
47 | systemProperty 'eureka.validateInstanceId', 'false'
48 | systemProperty 'eureka.serviceUrl.default', 'http://localhost:8080/eureka/v2/'
49 | }
50 |
51 | mainClassName = "com.netflix.prana.Main"
52 |
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/gradle.properties:
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1 | #
2 | # Copyright 2014 Netflix, Inc.
3 | #
4 | # Licensed under the Apache License, Version 2.0 (the "License");
5 | # you may not use this file except in compliance with the License.
6 | # You may obtain a copy of the License at
7 | #
8 | # http://www.apache.org/licenses/LICENSE-2.0
9 | #
10 | # Unless required by applicable law or agreed to in writing, software
11 | # distributed under the License is distributed on an "AS IS" BASIS,
12 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | # See the License for the specific language governing permissions and
14 | # limitations under the License.
15 | #
16 |
17 | slf4j_version=1.7.6
18 |
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/gradle/wrapper/gradle-wrapper.jar:
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/gradle/wrapper/gradle-wrapper.properties:
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1 | #Wed Jan 21 14:40:34 PST 2015
2 | distributionBase=GRADLE_USER_HOME
3 | distributionPath=wrapper/dists
4 | zipStoreBase=GRADLE_USER_HOME
5 | zipStorePath=wrapper/dists
6 | distributionUrl=https\://services.gradle.org/distributions/gradle-2.2.1-bin.zip
7 |
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/gradlew:
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1 | #!/usr/bin/env bash
2 |
3 | ##############################################################################
4 | ##
5 | ## Gradle start up script for UN*X
6 | ##
7 | ##############################################################################
8 |
9 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
10 | DEFAULT_JVM_OPTS=""
11 |
12 | APP_NAME="Gradle"
13 | APP_BASE_NAME=`basename "$0"`
14 |
15 | # Use the maximum available, or set MAX_FD != -1 to use that value.
16 | MAX_FD="maximum"
17 |
18 | warn ( ) {
19 | echo "$*"
20 | }
21 |
22 | die ( ) {
23 | echo
24 | echo "$*"
25 | echo
26 | exit 1
27 | }
28 |
29 | # OS specific support (must be 'true' or 'false').
30 | cygwin=false
31 | msys=false
32 | darwin=false
33 | case "`uname`" in
34 | CYGWIN* )
35 | cygwin=true
36 | ;;
37 | Darwin* )
38 | darwin=true
39 | ;;
40 | MINGW* )
41 | msys=true
42 | ;;
43 | esac
44 |
45 | # For Cygwin, ensure paths are in UNIX format before anything is touched.
46 | if $cygwin ; then
47 | [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
48 | fi
49 |
50 | # Attempt to set APP_HOME
51 | # Resolve links: $0 may be a link
52 | PRG="$0"
53 | # Need this for relative symlinks.
54 | while [ -h "$PRG" ] ; do
55 | ls=`ls -ld "$PRG"`
56 | link=`expr "$ls" : '.*-> \(.*\)$'`
57 | if expr "$link" : '/.*' > /dev/null; then
58 | PRG="$link"
59 | else
60 | PRG=`dirname "$PRG"`"/$link"
61 | fi
62 | done
63 | SAVED="`pwd`"
64 | cd "`dirname \"$PRG\"`/" >&-
65 | APP_HOME="`pwd -P`"
66 | cd "$SAVED" >&-
67 |
68 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
69 |
70 | # Determine the Java command to use to start the JVM.
71 | if [ -n "$JAVA_HOME" ] ; then
72 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
73 | # IBM's JDK on AIX uses strange locations for the executables
74 | JAVACMD="$JAVA_HOME/jre/sh/java"
75 | else
76 | JAVACMD="$JAVA_HOME/bin/java"
77 | fi
78 | if [ ! -x "$JAVACMD" ] ; then
79 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
80 |
81 | Please set the JAVA_HOME variable in your environment to match the
82 | location of your Java installation."
83 | fi
84 | else
85 | JAVACMD="java"
86 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
87 |
88 | Please set the JAVA_HOME variable in your environment to match the
89 | location of your Java installation."
90 | fi
91 |
92 | # Increase the maximum file descriptors if we can.
93 | if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
94 | MAX_FD_LIMIT=`ulimit -H -n`
95 | if [ $? -eq 0 ] ; then
96 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
97 | MAX_FD="$MAX_FD_LIMIT"
98 | fi
99 | ulimit -n $MAX_FD
100 | if [ $? -ne 0 ] ; then
101 | warn "Could not set maximum file descriptor limit: $MAX_FD"
102 | fi
103 | else
104 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
105 | fi
106 | fi
107 |
108 | # For Darwin, add options to specify how the application appears in the dock
109 | if $darwin; then
110 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
111 | fi
112 |
113 | # For Cygwin, switch paths to Windows format before running java
114 | if $cygwin ; then
115 | APP_HOME=`cygpath --path --mixed "$APP_HOME"`
116 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
117 |
118 | # We build the pattern for arguments to be converted via cygpath
119 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
120 | SEP=""
121 | for dir in $ROOTDIRSRAW ; do
122 | ROOTDIRS="$ROOTDIRS$SEP$dir"
123 | SEP="|"
124 | done
125 | OURCYGPATTERN="(^($ROOTDIRS))"
126 | # Add a user-defined pattern to the cygpath arguments
127 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then
128 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
129 | fi
130 | # Now convert the arguments - kludge to limit ourselves to /bin/sh
131 | i=0
132 | for arg in "$@" ; do
133 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
134 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
135 |
136 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
137 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
138 | else
139 | eval `echo args$i`="\"$arg\""
140 | fi
141 | i=$((i+1))
142 | done
143 | case $i in
144 | (0) set -- ;;
145 | (1) set -- "$args0" ;;
146 | (2) set -- "$args0" "$args1" ;;
147 | (3) set -- "$args0" "$args1" "$args2" ;;
148 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
149 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
150 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
151 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
152 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
153 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
154 | esac
155 | fi
156 |
157 | # Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
158 | function splitJvmOpts() {
159 | JVM_OPTS=("$@")
160 | }
161 | eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
162 | JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
163 |
164 | exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
165 |
--------------------------------------------------------------------------------
/gradlew.bat:
--------------------------------------------------------------------------------
1 | @if "%DEBUG%" == "" @echo off
2 | @rem ##########################################################################
3 | @rem
4 | @rem Gradle startup script for Windows
5 | @rem
6 | @rem ##########################################################################
7 |
8 | @rem Set local scope for the variables with windows NT shell
9 | if "%OS%"=="Windows_NT" setlocal
10 |
11 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
12 | set DEFAULT_JVM_OPTS=
13 |
14 | set DIRNAME=%~dp0
15 | if "%DIRNAME%" == "" set DIRNAME=.
16 | set APP_BASE_NAME=%~n0
17 | set APP_HOME=%DIRNAME%
18 |
19 | @rem Find java.exe
20 | if defined JAVA_HOME goto findJavaFromJavaHome
21 |
22 | set JAVA_EXE=java.exe
23 | %JAVA_EXE% -version >NUL 2>&1
24 | if "%ERRORLEVEL%" == "0" goto init
25 |
26 | echo.
27 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
28 | echo.
29 | echo Please set the JAVA_HOME variable in your environment to match the
30 | echo location of your Java installation.
31 |
32 | goto fail
33 |
34 | :findJavaFromJavaHome
35 | set JAVA_HOME=%JAVA_HOME:"=%
36 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe
37 |
38 | if exist "%JAVA_EXE%" goto init
39 |
40 | echo.
41 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
42 | echo.
43 | echo Please set the JAVA_HOME variable in your environment to match the
44 | echo location of your Java installation.
45 |
46 | goto fail
47 |
48 | :init
49 | @rem Get command-line arguments, handling Windowz variants
50 |
51 | if not "%OS%" == "Windows_NT" goto win9xME_args
52 | if "%@eval[2+2]" == "4" goto 4NT_args
53 |
54 | :win9xME_args
55 | @rem Slurp the command line arguments.
56 | set CMD_LINE_ARGS=
57 | set _SKIP=2
58 |
59 | :win9xME_args_slurp
60 | if "x%~1" == "x" goto execute
61 |
62 | set CMD_LINE_ARGS=%*
63 | goto execute
64 |
65 | :4NT_args
66 | @rem Get arguments from the 4NT Shell from JP Software
67 | set CMD_LINE_ARGS=%$
68 |
69 | :execute
70 | @rem Setup the command line
71 |
72 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
73 |
74 | @rem Execute Gradle
75 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
76 |
77 | :end
78 | @rem End local scope for the variables with windows NT shell
79 | if "%ERRORLEVEL%"=="0" goto mainEnd
80 |
81 | :fail
82 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
83 | rem the _cmd.exe /c_ return code!
84 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
85 | exit /b 1
86 |
87 | :mainEnd
88 | if "%OS%"=="Windows_NT" endlocal
89 |
90 | :omega
91 |
--------------------------------------------------------------------------------
/images/Prana.png:
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https://raw.githubusercontent.com/Netflix/Prana/11b3f80b69e8614a00a84b52e39c5ee6f97e5546/images/Prana.png
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/images/Prana_Small.png:
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https://raw.githubusercontent.com/Netflix/Prana/11b3f80b69e8614a00a84b52e39c5ee6f97e5546/images/Prana_Small.png
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/sample_config.properties:
--------------------------------------------------------------------------------
1 | #
2 | # Copyright 2014 Netflix, Inc.
3 | #
4 | # Licensed under the Apache License, Version 2.0 (the "License");
5 | # you may not use this file except in compliance with the License.
6 | # You may obtain a copy of the License at
7 | #
8 | # http://www.apache.org/licenses/LICENSE-2.0
9 | #
10 | # Unless required by applicable law or agreed to in writing, software
11 | # distributed under the License is distributed on an "AS IS" BASIS,
12 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | # See the License for the specific language governing permissions and
14 | # limitations under the License.
15 | #
16 |
17 | ####################
18 | # Prana Properties
19 | ####################
20 | # Ensure that this url is accessible locally and returns valid Prana healthcheck responses
21 | # Note that this is likely on the same port as eureka.port
22 | prana.host.healthcheck.url=http://localhost:5050/status
23 | # Timeout for calls to the healthcheck in ms
24 | prana.host.healthcheck.timeout=1500
25 | # List of accepted encodings for the Prana proxy
26 | prana.proxy.req.acceptencoding=gzip
27 |
28 |
29 | ####################
30 | # Eureka Service Registration Properties
31 | ####################
32 | # Change this to the application name for your side managed process
33 | eureka.name=MYSERVICE
34 | # Change this to the VIP address for you side managed process
35 | eureka.vipAddress=MYSERVICE
36 | # This is the port your want clients to connect to in your side managed process
37 | eureka.port=5050
38 |
39 | ####################
40 | # Eureka Connectivity Properties
41 | ####################
42 | # Change this to a working eureka-client configuration. For simplicity
43 | # this Prana example assumes a single eureka server
44 | eureka.serviceUrl.default=http://eurekaserverhostnameorip:8080/eureka
45 | # In Karyon 2.0, Erueka will assume DatacenterInfo (Amazon) and without the
46 | # below property, service registration will fail if you are running outside of
47 | # Amazon (for development). In Amazon, delete this property.
48 | eureka.validateInstanceId=false
49 |
--------------------------------------------------------------------------------
/settings.gradle:
--------------------------------------------------------------------------------
1 | /*
2 | * Copyright 2014 Netflix, Inc.
3 | *
4 | * Licensed under the Apache License, Version 2.0 (the "License");
5 | * you may not use this file except in compliance with the License.
6 | * You may obtain a copy of the License at
7 | *
8 | * http://www.apache.org/licenses/LICENSE-2.0
9 | *
10 | * Unless required by applicable law or agreed to in writing, software
11 | * distributed under the License is distributed on an "AS IS" BASIS,
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | * See the License for the specific language governing permissions and
14 | * limitations under the License.
15 | */
16 |
17 | rootProject.name='Prana'
18 |
--------------------------------------------------------------------------------
/src/main/java/com/netflix/prana/Main.java:
--------------------------------------------------------------------------------
1 | /*
2 | * Copyright 2014 Netflix, Inc.
3 | *
4 | * Licensed under the Apache License, Version 2.0 (the "License");
5 | * you may not use this file except in compliance with the License.
6 | * You may obtain a copy of the License at
7 | *
8 | * http://www.apache.org/licenses/LICENSE-2.0
9 | *
10 | * Unless required by applicable law or agreed to in writing, software
11 | * distributed under the License is distributed on an "AS IS" BASIS,
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | * See the License for the specific language governing permissions and
14 | * limitations under the License.
15 | */
16 | package com.netflix.prana;
17 |
18 | import com.google.inject.Injector;
19 | import com.netflix.config.ConfigurationManager;
20 | import com.netflix.config.DeploymentContext;
21 | import com.netflix.governator.guice.LifecycleInjector;
22 | import com.netflix.governator.lifecycle.LifecycleManager;
23 | import com.netflix.karyon.KaryonServer;
24 | import com.netflix.prana.config.PranaConfig;
25 | import com.netflix.prana.http.api.HandlersModule;
26 | import com.netflix.prana.service.ServiceModule;
27 | import org.kohsuke.args4j.CmdLineException;
28 | import org.kohsuke.args4j.CmdLineParser;
29 | import org.slf4j.Logger;
30 | import org.slf4j.LoggerFactory;
31 |
32 | import java.io.FileInputStream;
33 | import java.io.FileNotFoundException;
34 | import java.util.Properties;
35 |
36 | public class Main {
37 |
38 | private static Logger logger = LoggerFactory.getLogger(Main.class);
39 |
40 | public static void main(String[] args) {
41 | PranaConfig pranaConfig = new PranaConfig();
42 | CmdLineParser cmdLineParser = new CmdLineParser(pranaConfig);
43 | try {
44 | cmdLineParser.parseArgument(args);
45 | } catch (CmdLineException e) {
46 | System.err.println(e.getMessage());
47 | cmdLineParser.printUsage(System.err);
48 | System.exit(1);
49 | }
50 |
51 |
52 | try {
53 | MainModule sm = new MainModule(pranaConfig);
54 | try {
55 | FileInputStream fileInputStream = new FileInputStream(pranaConfig.getConfigFile());
56 | Properties properties = new Properties();
57 | properties.load(fileInputStream);
58 | ConfigurationManager.loadProperties(properties);
59 | } catch (FileNotFoundException fox) {
60 | logger.error(String.format("Config file %s is not present, loading default properties present in classpath",
61 | pranaConfig.getConfigFile()));
62 | }
63 | DeploymentContext deploymentContext = ConfigurationManager.getDeploymentContext();
64 | deploymentContext.setApplicationId(pranaConfig.getAppName());
65 | Injector injector = LifecycleInjector.builder().withModules(sm, new ServiceModule(), new HandlersModule()).build().createInjector();
66 | LifecycleManager manager = injector.getInstance(LifecycleManager.class);
67 | manager.start();
68 |
69 | KaryonServer karyonServer = injector.getInstance(KaryonServer.class);
70 | karyonServer.startAndWaitTillShutdown();
71 | } catch (Exception e) {
72 | logger.error(e.getMessage());
73 | System.exit(1);
74 | }
75 | }
76 |
77 | }
78 |
--------------------------------------------------------------------------------
/src/main/java/com/netflix/prana/MainModule.java:
--------------------------------------------------------------------------------
1 | /*
2 | * Copyright 2014 Netflix, Inc.
3 | *
4 | * Licensed under the Apache License, Version 2.0 (the "License");
5 | * you may not use this file except in compliance with the License.
6 | * You may obtain a copy of the License at
7 | *
8 | * http://www.apache.org/licenses/LICENSE-2.0
9 | *
10 | * Unless required by applicable law or agreed to in writing, software
11 | * distributed under the License is distributed on an "AS IS" BASIS,
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | * See the License for the specific language governing permissions and
14 | * limitations under the License.
15 | */
16 | package com.netflix.prana;
17 |
18 | import com.google.inject.AbstractModule;
19 | import com.google.inject.Inject;
20 | import com.google.inject.Provides;
21 | import com.google.inject.Singleton;
22 | import com.netflix.adminresources.resources.KaryonWebAdminModule;
23 | import com.netflix.karyon.Karyon;
24 | import com.netflix.karyon.KaryonBootstrapSuite;
25 | import com.netflix.karyon.KaryonServer;
26 | import com.netflix.karyon.archaius.ArchaiusSuite;
27 | import com.netflix.karyon.eureka.KaryonEurekaModule;
28 | import com.netflix.prana.config.PranaConfig;
29 | import com.netflix.prana.http.api.SimpleRouter;
30 |
31 | public class MainModule extends AbstractModule {
32 |
33 | private PranaConfig config;
34 |
35 | public MainModule(PranaConfig config) {
36 | this.config = config;
37 | }
38 |
39 | @Override
40 | protected void configure() {
41 | }
42 |
43 | @Provides
44 | @Singleton
45 | @Inject
46 | public KaryonServer providesKaryonSever(SimpleRouter simpleRouter) {
47 | return Karyon.forRequestHandler(config.getHttpPort(),
48 | simpleRouter,
49 | new KaryonBootstrapSuite(),
50 | KaryonEurekaModule.asSuite(),
51 | KaryonWebAdminModule.asSuite(),
52 | new ArchaiusSuite(config.getAppName())
53 | );
54 | }
55 | }
56 |
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/src/main/java/com/netflix/prana/config/PranaConfig.java:
--------------------------------------------------------------------------------
1 | /*
2 | * Copyright 2014 Netflix, Inc.
3 | *
4 | * Licensed under the Apache License, Version 2.0 (the "License");
5 | * you may not use this file except in compliance with the License.
6 | * You may obtain a copy of the License at
7 | *
8 | * http://www.apache.org/licenses/LICENSE-2.0
9 | *
10 | * Unless required by applicable law or agreed to in writing, software
11 | * distributed under the License is distributed on an "AS IS" BASIS,
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | * See the License for the specific language governing permissions and
14 | * limitations under the License.
15 | */
16 | package com.netflix.prana.config;
17 |
18 | import org.kohsuke.args4j.Option;
19 |
20 | public class PranaConfig {
21 |
22 | @Option(name = "-p", aliases = "--http-port-api", usage = "Http Port of Prana Server")
23 | private int httpPort = 8078;
24 |
25 | @Option(name = "-a", aliases = "--app-name", usage = "Parent host application name")
26 | private String appName = "prana";
27 |
28 | @Option(name = "-c", aliases = "--config", usage = "Prana configuration file")
29 | private String configFile = "prana.properties";
30 |
31 | public int getHttpPort() {
32 | return httpPort;
33 | }
34 |
35 | public String getAppName() {
36 | return appName;
37 | }
38 |
39 | public String getConfigFile() {
40 | return configFile;
41 | }
42 | }
43 |
--------------------------------------------------------------------------------
/src/main/java/com/netflix/prana/http/Context.java:
--------------------------------------------------------------------------------
1 | /*
2 | * Copyright 2014 Netflix, Inc.
3 | *
4 | * Licensed under the Apache License, Version 2.0 (the "License");
5 | * you may not use this file except in compliance with the License.
6 | * You may obtain a copy of the License at
7 | *
8 | * http://www.apache.org/licenses/LICENSE-2.0
9 | *
10 | * Unless required by applicable law or agreed to in writing, software
11 | * distributed under the License is distributed on an "AS IS" BASIS,
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | * See the License for the specific language governing permissions and
14 | * limitations under the License.
15 | */
16 |
17 | package com.netflix.prana.http;
18 |
19 | import io.netty.handler.codec.http.HttpResponseStatus;
20 | import rx.Observable;
21 |
22 | import java.util.List;
23 |
24 | /**
25 | * A context is a collection of functions to aid in the request handling process
26 | */
27 | public interface Context {
28 |
29 | /**
30 | * Serializes an object and writes the bytes to the response stream
31 | *
32 | * @param object response object
33 | */
34 | Observable send(Object object);
35 |
36 | /**
37 | * Sends a simple text message back through the response stream
38 | *
39 | * @param message the message to deliver
40 | */
41 | Observable sendSimple(String message);
42 |
43 | /**
44 | * Serializes a simple error message back to the response using the supplied status code
45 | *
46 | * @param status the status code for the response
47 | * @param message the message to send back to the caller
48 | */
49 | Observable sendError(HttpResponseStatus status, String message);
50 |
51 | /**
52 | * Retrieves the value of the specified header
53 | *
54 | * @param name the name of the header to retrieve
55 | * @return the header value
56 | */
57 | String getHeader(String name);
58 |
59 | /**
60 | * Sets the response header value
61 | *
62 | * @param name the header's name
63 | * @param value the value of the header
64 | */
65 | void setHeader(String name, String value);
66 |
67 | /**
68 | * Convenience method for retrieving a query parameter off of the request
69 | *
70 | * @param key the query parameter
71 | * @return the query param value
72 | */
73 | String getQueryParam(String key);
74 |
75 | /**
76 | * Convenience method for retrieving a query parameter off of the request that contains multiple values
77 | *
78 | * @param key the name of the query parameter
79 | * @return the list of values from the query parameter
80 | */
81 | List getQueryParams(String key);
82 | }
83 |
--------------------------------------------------------------------------------
/src/main/java/com/netflix/prana/http/api/AbstractRequestHandler.java:
--------------------------------------------------------------------------------
1 | /*
2 | * Copyright 2014 Netflix, Inc.
3 | *
4 | * Licensed under the Apache License, Version 2.0 (the "License");
5 | * you may not use this file except in compliance with the License.
6 | * You may obtain a copy of the License at
7 | *
8 | * http://www.apache.org/licenses/LICENSE-2.0
9 | *
10 | * Unless required by applicable law or agreed to in writing, software
11 | * distributed under the License is distributed on an "AS IS" BASIS,
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | * See the License for the specific language governing permissions and
14 | * limitations under the License.
15 | */
16 |
17 | package com.netflix.prana.http.api;
18 |
19 | import com.fasterxml.jackson.databind.ObjectMapper;
20 | import com.netflix.prana.http.Context;
21 | import com.netflix.prana.internal.DefaultContext;
22 | import io.netty.buffer.ByteBuf;
23 | import io.reactivex.netty.protocol.http.server.HttpServerRequest;
24 | import io.reactivex.netty.protocol.http.server.HttpServerResponse;
25 | import io.reactivex.netty.protocol.http.server.RequestHandler;
26 | import rx.Observable;
27 |
28 | public abstract class AbstractRequestHandler implements RequestHandler {
29 |
30 | private final ObjectMapper objectMapper;
31 |
32 | protected AbstractRequestHandler(ObjectMapper objectMapper) {
33 | this.objectMapper = objectMapper;
34 | }
35 |
36 | abstract Observable handle(Context context);
37 |
38 | @Override
39 | public Observable handle(HttpServerRequest request, final HttpServerResponse response) {
40 | DefaultContext context = new DefaultContext(request, response, objectMapper);
41 | return handle(context);
42 | }
43 | }
44 |
--------------------------------------------------------------------------------
/src/main/java/com/netflix/prana/http/api/DynamicPropertiesHandler.java:
--------------------------------------------------------------------------------
1 | /*
2 | * Copyright 2014 Netflix, Inc.
3 | *
4 | * Licensed under the Apache License, Version 2.0 (the "License");
5 | * you may not use this file except in compliance with the License.
6 | * You may obtain a copy of the License at
7 | *
8 | * http://www.apache.org/licenses/LICENSE-2.0
9 | *
10 | * Unless required by applicable law or agreed to in writing, software
11 | * distributed under the License is distributed on an "AS IS" BASIS,
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | * See the License for the specific language governing permissions and
14 | * limitations under the License.
15 | */
16 | package com.netflix.prana.http.api;
17 |
18 | import com.fasterxml.jackson.databind.ObjectMapper;
19 | import com.netflix.config.DynamicProperty;
20 | import com.netflix.prana.http.Context;
21 | import rx.Observable;
22 |
23 | import javax.inject.Inject;
24 | import java.util.HashMap;
25 | import java.util.List;
26 | import java.util.Map;
27 |
28 | /**
29 | * Created by dchoudhury on 10/20/14.
30 | */
31 | public class DynamicPropertiesHandler extends AbstractRequestHandler {
32 |
33 | private static final String ID_QUERY_PARAMETER = "id";
34 |
35 | @Inject
36 | public DynamicPropertiesHandler(ObjectMapper objectMapper) {
37 | super(objectMapper);
38 | }
39 |
40 | @Override
41 | Observable handle(Context context) {
42 | Map properties = new HashMap<>();
43 | List ids = context.getQueryParams(ID_QUERY_PARAMETER);
44 | for (String id : ids) {
45 | String property = DynamicProperty.getInstance(id).getString(null);
46 | properties.put(id, property);
47 | }
48 | return context.send(properties);
49 | }
50 | }
51 |
--------------------------------------------------------------------------------
/src/main/java/com/netflix/prana/http/api/HandlersModule.java:
--------------------------------------------------------------------------------
1 | /*
2 | * Copyright 2014 Netflix, Inc.
3 | *
4 | * Licensed under the Apache License, Version 2.0 (the "License");
5 | * you may not use this file except in compliance with the License.
6 | * You may obtain a copy of the License at
7 | *
8 | * http://www.apache.org/licenses/LICENSE-2.0
9 | *
10 | * Unless required by applicable law or agreed to in writing, software
11 | * distributed under the License is distributed on an "AS IS" BASIS,
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | * See the License for the specific language governing permissions and
14 | * limitations under the License.
15 | */
16 | package com.netflix.prana.http.api;
17 |
18 | import com.google.inject.AbstractModule;
19 | import com.google.inject.Scopes;
20 |
21 | /**
22 | * Created by dchoudhury on 10/17/14.
23 | */
24 | public class HandlersModule extends AbstractModule {
25 |
26 | @Override
27 | protected void configure() {
28 | bind(StatusHandler.class).in(Scopes.SINGLETON);
29 | bind(SimpleRouter.class).in(Scopes.SINGLETON);
30 | bind(ProxyHandler.class).in(Scopes.SINGLETON);
31 | bind(HealthCheckHandler.class).in(Scopes.SINGLETON);
32 | }
33 | }
34 |
--------------------------------------------------------------------------------
/src/main/java/com/netflix/prana/http/api/HealthCheckHandler.java:
--------------------------------------------------------------------------------
1 | /*
2 | * Copyright 2014 Netflix, Inc.
3 | *
4 | * Licensed under the Apache License, Version 2.0 (the "License");
5 | * you may not use this file except in compliance with the License.
6 | * You may obtain a copy of the License at
7 | *
8 | * http://www.apache.org/licenses/LICENSE-2.0
9 | *
10 | * Unless required by applicable law or agreed to in writing, software
11 | * distributed under the License is distributed on an "AS IS" BASIS,
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | * See the License for the specific language governing permissions and
14 | * limitations under the License.
15 | */
16 | package com.netflix.prana.http.api;
17 |
18 | import com.fasterxml.jackson.databind.ObjectMapper;
19 | import com.google.common.base.Strings;
20 | import com.netflix.config.DynamicProperty;
21 | import com.netflix.prana.http.Context;
22 | import io.netty.buffer.ByteBuf;
23 | import io.netty.channel.ChannelOption;
24 | import io.netty.handler.codec.http.HttpResponseStatus;
25 | import io.reactivex.netty.RxNetty;
26 | import io.reactivex.netty.pipeline.PipelineConfigurators;
27 | import io.reactivex.netty.protocol.http.client.HttpClient;
28 | import io.reactivex.netty.protocol.http.client.HttpClientRequest;
29 | import io.reactivex.netty.protocol.http.client.HttpClientResponse;
30 | import rx.Observable;
31 | import rx.exceptions.OnErrorThrowable;
32 | import rx.functions.Func1;
33 |
34 | import javax.inject.Inject;
35 | import java.net.MalformedURLException;
36 | import java.net.URL;
37 |
38 | public class HealthCheckHandler extends AbstractRequestHandler {
39 | private static final String DEFAULT_CONTENT_TYPE = "application/xml";
40 | private static final Observable DEFAULT_NOOP_RESPONSE = Observable.just(null);
41 |
42 | public static final int DEFAULT_APPLICATION_PORT = 7101;
43 | public static final int DEFAULT_CONNECTION_TIMEOUT = 2000;
44 | public static final String DEFAULT_HEALTHCHECK_ENDPOINT = "http://localhost:7001/healthcheck";
45 | public static final String DEFAULT_OK_HEALTH = "ok";
46 | public static final String DEFAULT_FAIL_HEALTH = "fail";
47 |
48 |
49 | @Inject
50 | public HealthCheckHandler(ObjectMapper objectMapper) {
51 | super(objectMapper);
52 | }
53 |
54 | @Override
55 | Observable handle(final Context context) {
56 | String externalHealthCheckURL = DynamicProperty.getInstance("prana.host.healthcheck.url")
57 | .getString(DEFAULT_HEALTHCHECK_ENDPOINT);
58 | context.setHeader("Content-type", DEFAULT_CONTENT_TYPE);
59 | if (Strings.isNullOrEmpty(externalHealthCheckURL)) {
60 | return context.sendSimple(DEFAULT_OK_HEALTH);
61 | } else {
62 | return getResponse(externalHealthCheckURL).flatMap(new Func1, Observable>() {
63 | @Override
64 | public Observable call(HttpClientResponse response) {
65 | if (response.getStatus().code() == HttpResponseStatus.OK.code()) {
66 | context.sendSimple(DEFAULT_OK_HEALTH);
67 | } else {
68 | context.sendError(HttpResponseStatus.SERVICE_UNAVAILABLE, DEFAULT_FAIL_HEALTH);
69 | }
70 | return DEFAULT_NOOP_RESPONSE;
71 | }
72 | }).onErrorFlatMap(new Func1>() {
73 | @Override
74 | public Observable call(OnErrorThrowable onErrorThrowable) {
75 | context.sendError(HttpResponseStatus.SERVICE_UNAVAILABLE, DEFAULT_FAIL_HEALTH);
76 | return DEFAULT_NOOP_RESPONSE;
77 | }
78 | });
79 | }
80 | }
81 |
82 | private Observable> getResponse(String externalHealthCheckURL) {
83 | String host = "localhost";
84 | int port = DEFAULT_APPLICATION_PORT;
85 | String path = "/healthcheck";
86 | try {
87 | URL url = new URL(externalHealthCheckURL);
88 | host = url.getHost();
89 | port = url.getPort();
90 | path = url.getPath();
91 | } catch (MalformedURLException e) {
92 | //continue
93 | }
94 | Integer timeout = DynamicProperty.getInstance("prana.host.healthcheck.timeout").getInteger(DEFAULT_CONNECTION_TIMEOUT);
95 | HttpClient httpClient = RxNetty.newHttpClientBuilder(host, port)
96 | .pipelineConfigurator(PipelineConfigurators.httpClientConfigurator())
97 | .channelOption(ChannelOption.CONNECT_TIMEOUT_MILLIS, timeout)
98 | .build();
99 | return httpClient.submit(HttpClientRequest.createGet(path));
100 |
101 | }
102 |
103 | }
104 |
--------------------------------------------------------------------------------
/src/main/java/com/netflix/prana/http/api/HostsHandler.java:
--------------------------------------------------------------------------------
1 | /*
2 | * Copyright 2014 Netflix, Inc.
3 | *
4 | * Licensed under the Apache License, Version 2.0 (the "License");
5 | * you may not use this file except in compliance with the License.
6 | * You may obtain a copy of the License at
7 | *
8 | * http://www.apache.org/licenses/LICENSE-2.0
9 | *
10 | * Unless required by applicable law or agreed to in writing, software
11 | * distributed under the License is distributed on an "AS IS" BASIS,
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | * See the License for the specific language governing permissions and
14 | * limitations under the License.
15 | */
16 | package com.netflix.prana.http.api;
17 |
18 | import com.fasterxml.jackson.databind.ObjectMapper;
19 | import com.google.common.base.Strings;
20 | import com.google.inject.Inject;
21 | import com.netflix.appinfo.InstanceInfo;
22 | import com.netflix.prana.http.Context;
23 | import com.netflix.prana.service.HostService;
24 | import io.netty.handler.codec.http.HttpResponseStatus;
25 | import rx.Observable;
26 |
27 | import java.util.ArrayList;
28 | import java.util.List;
29 |
30 | import static com.netflix.appinfo.InstanceInfo.InstanceStatus;
31 |
32 | /**
33 | * Created by dchoudhury on 10/20/14.
34 | */
35 | public class HostsHandler extends AbstractRequestHandler {
36 |
37 | private final HostService hostService;
38 |
39 | @Inject
40 | public HostsHandler(HostService hostService, ObjectMapper objectMapper) {
41 | super(objectMapper);
42 | this.hostService = hostService;
43 | }
44 |
45 | @Override
46 | Observable handle(Context context) {
47 | String appName = context.getQueryParam("appName");
48 | String vip = context.getQueryParam("vip");
49 | if (Strings.isNullOrEmpty(appName)) {
50 | return context.sendError(HttpResponseStatus.BAD_REQUEST, "appName has to be specified");
51 | } else {
52 | List instances = hostService.getHosts(appName);
53 | List hosts = new ArrayList<>();
54 | for (InstanceInfo instanceInfo : instances) {
55 | if (vip != null && !instanceInfo.getVIPAddress().contains(vip) && instanceInfo.getStatus().equals(InstanceStatus.UP)) {
56 | continue;
57 | }
58 | hosts.add(instanceInfo.getHostName());
59 | }
60 | return context.send(hosts);
61 | }
62 | }
63 | }
64 |
--------------------------------------------------------------------------------
/src/main/java/com/netflix/prana/http/api/NIWSCommand.java:
--------------------------------------------------------------------------------
1 | /*
2 | * Copyright 2014 Netflix, Inc.
3 | *
4 | * Licensed under the Apache License, Version 2.0 (the "License");
5 | * you may not use this file except in compliance with the License.
6 | * You may obtain a copy of the License at
7 | *
8 | * http://www.apache.org/licenses/LICENSE-2.0
9 | *
10 | * Unless required by applicable law or agreed to in writing, software
11 | * distributed under the License is distributed on an "AS IS" BASIS,
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | * See the License for the specific language governing permissions and
14 | * limitations under the License.
15 | */
16 | package com.netflix.prana.http.api;
17 |
18 | import com.netflix.hystrix.HystrixCommandProperties;
19 | import com.netflix.ribbon.transport.netty.http.LoadBalancingHttpClient;
20 | import com.netflix.hystrix.HystrixCommandGroupKey;
21 | import com.netflix.hystrix.HystrixCommandKey;
22 | import com.netflix.hystrix.HystrixObservableCommand;
23 | import io.netty.buffer.ByteBuf;
24 | import io.reactivex.netty.protocol.http.client.HttpClientRequest;
25 | import io.reactivex.netty.protocol.http.client.HttpClientResponse;
26 | import rx.Observable;
27 |
28 | public class NIWSCommand extends HystrixObservableCommand> {
29 |
30 | private final LoadBalancingHttpClient httpClient;
31 |
32 | private final HttpClientRequest req;
33 |
34 | protected NIWSCommand(LoadBalancingHttpClient httpClient, HttpClientRequest req,
35 | HystrixCommandKey key) {
36 | super(Setter.withGroupKey(HystrixCommandGroupKey.Factory.asKey("prana")).andCommandKey(key).
37 | andCommandPropertiesDefaults(HystrixCommandProperties.Setter().
38 | withExecutionIsolationThreadTimeoutInMilliseconds(10000).
39 | withRequestCacheEnabled(false).
40 | withExecutionIsolationSemaphoreMaxConcurrentRequests(1000).
41 | withCircuitBreakerEnabled(false)));
42 |
43 | this.httpClient = httpClient;
44 | this.req = req;
45 | }
46 |
47 | @Override
48 | protected Observable> run() {
49 | return httpClient.submit(req);
50 | }
51 | }
52 |
--------------------------------------------------------------------------------
/src/main/java/com/netflix/prana/http/api/PingHandler.java:
--------------------------------------------------------------------------------
1 | /*
2 | * Copyright 2014 Netflix, Inc.
3 | *
4 | * Licensed under the Apache License, Version 2.0 (the "License");
5 | * you may not use this file except in compliance with the License.
6 | * You may obtain a copy of the License at
7 | *
8 | * http://www.apache.org/licenses/LICENSE-2.0
9 | *
10 | * Unless required by applicable law or agreed to in writing, software
11 | * distributed under the License is distributed on an "AS IS" BASIS,
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | * See the License for the specific language governing permissions and
14 | * limitations under the License.
15 | */
16 | package com.netflix.prana.http.api;
17 |
18 | import com.fasterxml.jackson.databind.ObjectMapper;
19 | import com.netflix.prana.http.Context;
20 | import rx.Observable;
21 |
22 | import javax.inject.Inject;
23 |
24 | public class PingHandler extends AbstractRequestHandler {
25 |
26 | private static final String CACHE_CONTROL_HEADER = "Cache-Control";
27 | private static final String CACHE_CONTROL_HEADER_VAL = "must-revalidate,no-cache,no-store";
28 | private static final String DEFAULT_PONG_RESPONSE = "pong";
29 |
30 | @Inject
31 | public PingHandler(ObjectMapper objectMapper) {
32 | super(objectMapper);
33 | }
34 |
35 | @Override
36 | Observable handle(Context context) {
37 | context.setHeader(CACHE_CONTROL_HEADER, CACHE_CONTROL_HEADER_VAL);
38 | return context.sendSimple(DEFAULT_PONG_RESPONSE);
39 | }
40 | }
41 |
--------------------------------------------------------------------------------
/src/main/java/com/netflix/prana/http/api/ProxyHandler.java:
--------------------------------------------------------------------------------
1 | /*
2 | * Copyright 2014 Netflix, Inc.
3 | *
4 | * Licensed under the Apache License, Version 2.0 (the "License");
5 | * you may not use this file except in compliance with the License.
6 | * You may obtain a copy of the License at
7 | *
8 | * http://www.apache.org/licenses/LICENSE-2.0
9 | *
10 | * Unless required by applicable law or agreed to in writing, software
11 | * distributed under the License is distributed on an "AS IS" BASIS,
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | * See the License for the specific language governing permissions and
14 | * limitations under the License.
15 | */
16 | package com.netflix.prana.http.api;
17 |
18 | import com.google.common.base.Strings;
19 | import com.netflix.client.config.IClientConfig;
20 | import com.netflix.client.config.IClientConfigKey;
21 | import com.netflix.config.DynamicProperty;
22 | import com.netflix.niws.loadbalancer.DiscoveryEnabledNIWSServerList;
23 | import com.netflix.ribbon.transport.netty.RibbonTransport;
24 | import com.netflix.ribbon.transport.netty.http.LoadBalancingHttpClient;
25 | import io.netty.buffer.ByteBuf;
26 | import io.reactivex.netty.protocol.http.client.HttpClientPipelineConfigurator;
27 | import io.reactivex.netty.protocol.http.client.HttpClientRequest;
28 | import io.reactivex.netty.protocol.http.client.HttpClientResponse;
29 | import io.reactivex.netty.protocol.http.server.HttpServerRequest;
30 | import io.reactivex.netty.protocol.http.server.HttpServerResponse;
31 | import io.reactivex.netty.protocol.http.server.RequestHandler;
32 | import org.slf4j.Logger;
33 | import org.slf4j.LoggerFactory;
34 | import rx.Observable;
35 | import rx.functions.Action0;
36 | import rx.functions.Action1;
37 | import rx.functions.Func1;
38 |
39 | import java.util.List;
40 | import java.util.Map;
41 | import java.util.Set;
42 | import java.util.concurrent.ConcurrentHashMap;
43 |
44 | public class ProxyHandler implements RequestHandler {
45 |
46 | private static final ConcurrentHashMap> httpClients = new ConcurrentHashMap<>();
47 |
48 | private final String PROXY_REQ_ACCEPT_ENCODING = DynamicProperty.getInstance("prana.proxy.req.acceptencoding").getString("deflate, gzip");
49 |
50 | private Logger logger = LoggerFactory.getLogger(getClass().getName());
51 |
52 | private final String ERROR_RESPONSE = "500Error forwarding request to origin";
53 |
54 |
55 | @Override
56 | public Observable handle(final HttpServerRequest serverRequest, final HttpServerResponse serverResponse) {
57 | String vip = Utils.forQueryParam(serverRequest.getQueryParameters(), "vip");
58 | String path = Utils.forQueryParam(serverRequest.getQueryParameters(), "path");
59 | if (Strings.isNullOrEmpty(vip)) {
60 | serverResponse.getHeaders().set("Content-Type", "application/xml");
61 | serverResponse.writeString(ERROR_RESPONSE);
62 | logger.error("VIP is empty");
63 | return serverResponse.close();
64 | }
65 |
66 | if (path == null) {
67 | path = "";
68 | }
69 |
70 | final LoadBalancingHttpClient client = getClient(vip);
71 | final HttpClientRequest req = HttpClientRequest.create(serverRequest.getHttpMethod(), path);
72 | populateRequestHeaders(serverRequest, req);
73 |
74 | final UnicastDisposableCachingSubject cachedContent = UnicastDisposableCachingSubject.create();
75 | /**
76 | * Why do we retain here?
77 | * After the onNext on the content returns, RxNetty releases the sent ByteBuf. This ByteBuf is kept out of
78 | * the scope of the onNext for consumption of the client in the route. The client when eventually writes
79 | * this ByteBuf over the wire expects the ByteBuf to be usable (i.e. ref count => 1). If this retain() call
80 | * is removed, the ref count will be 0 after the onNext on the content returns and hence it will be unusable
81 | * by the client in the route.
82 | */
83 | serverRequest.getContent().map(new Func1() {
84 | @Override
85 | public ByteBuf call(ByteBuf byteBuf) {
86 | return byteBuf.retain();
87 | }
88 | }).subscribe(cachedContent); // Caches data if arrived before client writes it out, else passes through
89 |
90 | req.withContentSource(cachedContent);
91 |
92 | return client.submit(req).flatMap(new Func1, Observable>() {
93 | @Override
94 | public Observable call(final HttpClientResponse response) {
95 | serverResponse.setStatus(response.getStatus());
96 | List> headers = response.getHeaders().entries();
97 | for (Map.Entry header : headers) {
98 | serverResponse.getHeaders().add(header.getKey(), header.getValue());
99 | }
100 | return response.getContent().map(new Func1() {
101 | @Override
102 | public ByteBuf call(ByteBuf byteBuf) {
103 | return byteBuf.retain();
104 | }
105 | }).map(new Func1() {
106 | @Override
107 | public Void call(ByteBuf byteBuf) {
108 | serverResponse.write(byteBuf);
109 | return null;
110 | }
111 | });
112 | }
113 | }).onErrorResumeNext(new Func1>() {
114 | @Override
115 | public Observable call(Throwable throwable) {
116 | serverResponse.getHeaders().set("Content-Type", "application/xml");
117 | serverResponse.writeString(ERROR_RESPONSE);
118 | return Observable.just(null);
119 | }
120 | }).doOnCompleted(new Action0() {
121 | @Override
122 | public void call() {
123 | serverResponse.close();
124 | cachedContent.dispose(new Action1() {
125 | @Override
126 | public void call(ByteBuf byteBuf) {
127 | /**
128 | * Why do we release here?
129 | *
130 | * All ByteBuf which were never consumed are disposed and sent here. This means that the
131 | * client in the route never consumed this ByteBuf. Before sending this ByteBuf to the
132 | * content subject, we do a retain (see above for reason) expecting the client in the route
133 | * to release it when written over the wire. In this case, though, the client never consumed
134 | * it and hence never released corresponding to the retain done by us.
135 | */
136 | if (byteBuf.refCnt() > 1) { // 1 refCount will be from the subject putting into the cache.
137 | byteBuf.release();
138 | }
139 | }
140 | });
141 | }
142 | });
143 | }
144 |
145 | private void populateRequestHeaders(HttpServerRequest serverRequest, HttpClientRequest request) {
146 | Set headerNames = serverRequest.getHeaders().names();
147 | for (String name : headerNames) {
148 | if (name.contains("content-length")) {
149 | continue;
150 | }
151 | request.getHeaders().add(name, serverRequest.getHeaders().getHeader(name));
152 | }
153 | // Normally always request gzipped from the server. But can be overridden with a Dynamic Property.
154 | if (PROXY_REQ_ACCEPT_ENCODING != null && PROXY_REQ_ACCEPT_ENCODING.length() > 0) {
155 | request.getHeaders().addHeader("accept-encoding", PROXY_REQ_ACCEPT_ENCODING);
156 | }
157 | //TODO Write X-Forwarded-Host, X-Forwarded-Port, X-Forwarded-Proto, X-Forwarded-For in the headers
158 | }
159 |
160 | private LoadBalancingHttpClient getClient(String vip) {
161 | LoadBalancingHttpClient client = httpClients.get(vip);
162 | if (client == null) {
163 | IClientConfig config = IClientConfig.Builder.newBuilder("prana_backend").
164 | withDefaultValues().
165 | withDeploymentContextBasedVipAddresses(vip).
166 | build().
167 | set(IClientConfigKey.Keys.MaxTotalConnections, 2000).
168 | set(IClientConfigKey.Keys.MaxConnectionsPerHost, 2000).
169 | set(IClientConfigKey.Keys.OkToRetryOnAllOperations, false).
170 | set(IClientConfigKey.Keys.NIWSServerListClassName, DiscoveryEnabledNIWSServerList.class.getName());
171 |
172 | client = RibbonTransport.newHttpClient(new HttpClientPipelineConfigurator(), config);
173 | httpClients.putIfAbsent(vip, client);
174 |
175 | }
176 | return client;
177 | }
178 |
179 | }
180 |
--------------------------------------------------------------------------------
/src/main/java/com/netflix/prana/http/api/SimpleRouter.java:
--------------------------------------------------------------------------------
1 | /*
2 | * Copyright 2014 Netflix, Inc.
3 | *
4 | * Licensed under the Apache License, Version 2.0 (the "License");
5 | * you may not use this file except in compliance with the License.
6 | * You may obtain a copy of the License at
7 | *
8 | * http://www.apache.org/licenses/LICENSE-2.0
9 | *
10 | * Unless required by applicable law or agreed to in writing, software
11 | * distributed under the License is distributed on an "AS IS" BASIS,
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | * See the License for the specific language governing permissions and
14 | * limitations under the License.
15 | */
16 | package com.netflix.prana.http.api;
17 |
18 | import com.google.inject.Inject;
19 | import com.netflix.karyon.transport.http.SimpleUriRouter;
20 | import io.netty.buffer.ByteBuf;
21 | import io.reactivex.netty.protocol.http.server.HttpServerRequest;
22 | import io.reactivex.netty.protocol.http.server.HttpServerResponse;
23 | import io.reactivex.netty.protocol.http.server.RequestHandler;
24 | import rx.Observable;
25 |
26 | /**
27 | * Created by dchoudhury on 10/20/14.
28 | */
29 | public class SimpleRouter implements RequestHandler {
30 |
31 | private final SimpleUriRouter delegate;
32 |
33 | @Inject
34 | public SimpleRouter(ProxyHandler proxyHandler, HealthCheckHandler healthCheckHandler, HostsHandler hostsHandler,
35 | PingHandler pingHandler, DynamicPropertiesHandler dynamicPropertiesHandler, StatusHandler statusHandler) {
36 | delegate = new SimpleUriRouter<>();
37 | delegate.addUri("/healthcheck", healthCheckHandler)
38 | .addUri("/dynamicproperties", dynamicPropertiesHandler)
39 | .addUri("/proxy", proxyHandler)
40 | .addUri("/eureka/hosts", hostsHandler)
41 | .addUri("/ping", pingHandler)
42 | .addUri("/status", statusHandler);
43 | }
44 |
45 | @Override
46 | public Observable handle(HttpServerRequest request, HttpServerResponse response) {
47 | return delegate.handle(request, response);
48 | }
49 | }
50 |
--------------------------------------------------------------------------------
/src/main/java/com/netflix/prana/http/api/StatusHandler.java:
--------------------------------------------------------------------------------
1 | /*
2 | * Copyright 2014 Netflix, Inc.
3 | *
4 | * Licensed under the Apache License, Version 2.0 (the "License");
5 | * you may not use this file except in compliance with the License.
6 | * You may obtain a copy of the License at
7 | *
8 | * http://www.apache.org/licenses/LICENSE-2.0
9 | *
10 | * Unless required by applicable law or agreed to in writing, software
11 | * distributed under the License is distributed on an "AS IS" BASIS,
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | * See the License for the specific language governing permissions and
14 | * limitations under the License.
15 | */
16 |
17 | package com.netflix.prana.http.api;
18 |
19 | import com.fasterxml.jackson.databind.ObjectMapper;
20 | import com.netflix.appinfo.ApplicationInfoManager;
21 | import com.netflix.prana.http.Context;
22 | import rx.Observable;
23 |
24 | import javax.inject.Inject;
25 | import java.util.HashMap;
26 | import java.util.Map;
27 |
28 | /**
29 | * A request handler to return the application's status in Discovery
30 | */
31 | public class StatusHandler extends AbstractRequestHandler {
32 |
33 | private final ApplicationInfoManager applicationInfoManager;
34 |
35 | @Inject
36 | public StatusHandler(ObjectMapper objectMapper, ApplicationInfoManager applicationInfoManager) {
37 | super(objectMapper);
38 | this.applicationInfoManager = applicationInfoManager;
39 | }
40 |
41 | @Override
42 | Observable handle(Context context) {
43 | Map status = new HashMap() {{
44 | put("status", applicationInfoManager.getInfo().getStatus().name());
45 | }};
46 | return context.send(status);
47 | }
48 | }
49 |
--------------------------------------------------------------------------------
/src/main/java/com/netflix/prana/http/api/UnicastDisposableCachingSubject.java:
--------------------------------------------------------------------------------
1 | /*
2 | * Copyright 2014 Netflix, Inc.
3 | *
4 | * Licensed under the Apache License, Version 2.0 (the "License");
5 | * you may not use this file except in compliance with the License.
6 | * You may obtain a copy of the License at
7 | *
8 | * http://www.apache.org/licenses/LICENSE-2.0
9 | *
10 | * Unless required by applicable law or agreed to in writing, software
11 | * distributed under the License is distributed on an "AS IS" BASIS,
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | * See the License for the specific language governing permissions and
14 | * limitations under the License.
15 | */
16 | package com.netflix.prana.http.api;
17 |
18 | import io.netty.util.ReferenceCountUtil;
19 | import io.netty.util.ReferenceCounted;
20 | import rx.Observer;
21 | import rx.Subscriber;
22 | import rx.functions.Action0;
23 | import rx.functions.Action1;
24 | import rx.internal.operators.NotificationLite;
25 | import rx.observers.Subscribers;
26 | import rx.subjects.Subject;
27 | import rx.subscriptions.Subscriptions;
28 |
29 | import java.util.concurrent.ConcurrentLinkedQueue;
30 | import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;
31 | import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
32 |
33 | /**
34 | * A {@link rx.subjects.Subject} implementation for caching {@link io.netty.util.ReferenceCounted} objects which can be disposed if not sent to
35 | * the sole subscriber of this subject.
36 | *
37 | * @author Nitesh Kant
38 | */
39 | final class UnicastDisposableCachingSubject extends Subject {
40 |
41 | private final State state;
42 |
43 | private UnicastDisposableCachingSubject(State state) {
44 | super(new OnSubscribeAction<>(state));
45 | this.state = state;
46 | }
47 |
48 | public static UnicastDisposableCachingSubject create() {
49 | State state = new State<>();
50 | return new UnicastDisposableCachingSubject<>(state);
51 | }
52 |
53 | /**
54 | * Disposes the items held by this subject which were not given out to the lone subscriber.
55 | *
56 | * @param disposedElementsProcessor All elements that were disposed are passed to this processor.
57 | */
58 | public void dispose(Action1 disposedElementsProcessor) {
59 | if (state.casState(State.STATES.UNSUBSCRIBED, State.STATES.DISPOSED)) {
60 | _dispose(disposedElementsProcessor);
61 | } else if (state.casState(State.STATES.SUBSCRIBED, State.STATES.DISPOSED)) {
62 | state.observerRef.onCompleted(); // Complete the existing subscription in case it is still not unsubscribed.
63 | _dispose(disposedElementsProcessor);
64 | }
65 | }
66 |
67 | private void _dispose(Action1 disposedElementsProcessor) {
68 | Subscriber noOpSub = new PassThruObserver<>(Subscribers.create(disposedElementsProcessor,
69 | new Action1() {
70 | @Override
71 | public void call(Throwable throwable) {
72 |
73 | }
74 | }),
75 | state); // Any buffering post buffer draining must not be lying in the buffer
76 | state.buffer.sendAllNotifications(noOpSub); // It is important to empty the buffer before setting the observer.
77 | // If not done, there can be two threads draining the buffer
78 | // (PassThroughObserver on any notification) and this thread.
79 | state.setObserverRef(noOpSub); // All future notifications are not sent anywhere.
80 | }
81 |
82 | /**
83 | * The common state.
84 | */
85 | private static final class State {
86 |
87 | /**
88 | * Following are the only possible state transitions:
89 | * UNSUBSCRIBED -> SUBSCRIBED
90 | * UNSUBSCRIBED -> DISPOSED
91 | */
92 | private enum STATES {
93 | UNSUBSCRIBED /*Initial*/, SUBSCRIBED /*Terminal state*/, DISPOSED/*Terminal state*/
94 | }
95 |
96 | private volatile int state = STATES.UNSUBSCRIBED.ordinal(); /*Values are the ordinals of STATES enum*/
97 |
98 | /**
99 | * Following Observers are associated with the states:
100 | * UNSUBSCRIBED => {@link BufferedObserver}
101 | * SUBSCRIBED => {@link PassThruObserver}
102 | * DISPOSED => {@link Subscribers#empty()}
103 | */
104 | private volatile Observer observerRef = new BufferedObserver();
105 |
106 | /**
107 | * The only buffer associated with this state. All notifications go to this buffer if no one has subscribed and
108 | * the {@link UnicastDisposableCachingSubject} instance is not disposed.
109 | */
110 | private final ByteBufAwareBuffer buffer = new ByteBufAwareBuffer<>();
111 |
112 | /**
113 | * Field updater for observerRef.
114 | */
115 | @SuppressWarnings("rawtypes")
116 | private static final AtomicReferenceFieldUpdater OBSERVER_UPDATER
117 | = AtomicReferenceFieldUpdater.newUpdater(State.class, Observer.class, "observerRef");
118 |
119 | /**
120 | * Field updater for state.
121 | */
122 | @SuppressWarnings("rawtypes")
123 | private static final AtomicIntegerFieldUpdater STATE_UPDATER
124 | = AtomicIntegerFieldUpdater.newUpdater(State.class, "state");
125 |
126 | public boolean casState(STATES expected, STATES next) {
127 | return STATE_UPDATER.compareAndSet(this, expected.ordinal(), next.ordinal());
128 | }
129 |
130 | public void setObserverRef(Observer o) { // Guarded by casState()
131 | observerRef = o;
132 | }
133 |
134 | public boolean casObserverRef(Observer expected, Observer next) {
135 | return OBSERVER_UPDATER.compareAndSet(this, expected, next);
136 | }
137 |
138 | /**
139 | * The default subscriber when the enclosing state is created.
140 | */
141 | private final class BufferedObserver extends Subscriber {
142 |
143 | private final NotificationLite