├── .gitignore ├── .travis.yml ├── LICENSE ├── README.md ├── build.gradle ├── config └── checkstyle │ └── checkstyle.xml ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── settings.gradle └── src ├── main └── java │ └── jetcd │ ├── EtcdApi.java │ ├── EtcdClient.java │ ├── EtcdClientFactory.java │ ├── EtcdClientImpl.java │ ├── EtcdException.java │ └── EtcdResponse.java └── test └── java └── jetcd └── EtcdClientTest.java /.gitignore: -------------------------------------------------------------------------------- 1 | .gradle 2 | .idea 3 | *.iml 4 | out 5 | build 6 | -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | language: java 2 | install: 3 | - git clone https://github.com/coreos/etcd 4 | - pushd etcd && git checkout v0.4.6 && ./build && popd 5 | before_script: 6 | - etcd/bin/etcd & 7 | after_script: 8 | - pkill -f etcd 9 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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-------------------------------------------------------------------------------- 1 | jetcd: A Java client for etcd 2 | ============================= 3 | 4 | [![Build Status](https://travis-ci.org/diwakergupta/jetcd.png)](https://travis-ci.org/diwakergupta/jetcd) 5 | 6 | Download 7 | -------- 8 | 9 | 10 | net.floatingsun 11 | jetcd 12 | 0.3.0 13 | 14 | 15 | Usage 16 | ----- 17 | 18 | // Connects to "http://127.0.0.1:4001" by default 19 | EtcdClient client = EtcdClientFactory.newInstance(); 20 | // Use EtcdClientFactory.newInstance(serverUrl) to override 21 | 22 | client.setKey("hello", "world"); 23 | client.getKey("hello") // returns "world" 24 | client.deleteKey("hello") 25 | 26 | TODO 27 | ---- 28 | 29 | * multiple servers with redirect 30 | * retries and better failure handling 31 | * better unification of 'getKey' and 'list' 32 | * support for watch 33 | -------------------------------------------------------------------------------- /build.gradle: -------------------------------------------------------------------------------- 1 | plugins { 2 | id "com.github.ben-manes.versions" version "0.5" 3 | id "com.bmuschko.nexus" version "2.1.1" 4 | } 5 | 6 | apply plugin: 'checkstyle' 7 | apply plugin: 'java' 8 | 9 | group = 'net.floatingsun' 10 | version = '0.4.0-SNAPSHOT' 11 | sourceCompatibility = 1.7 12 | targetCompatibility = 1.7 13 | 14 | repositories { 15 | mavenCentral() 16 | } 17 | 18 | dependencies { 19 | compile 'org.slf4j:slf4j-api:1.7.7' 20 | compile 'com.squareup.retrofit:retrofit:1.7.1' 21 | compile 'com.squareup.retrofit:converter-jackson:1.7.0' 22 | compile 'com.google.guava:guava:18.0' 23 | 24 | testCompile 'junit:junit:4.11' 25 | testCompile 'org.assertj:assertj-core:1.7.0' 26 | } 27 | 28 | modifyPom { 29 | project { 30 | name 'jetcd' 31 | description 'Java client for etcd' 32 | url 'https://github.com/diwakergupta/jetcd' 33 | inceptionYear '2013' 34 | 35 | scm { 36 | url 'https://github.com/diwakergupta/jetcd' 37 | connection 'scm:https://github.com/diwakergupta/jetcd' 38 | developerConnection 'scm:git@github.com:diwakergupta/jetcd.git' 39 | } 40 | 41 | licenses { 42 | license { 43 | name 'The Apache Software License, Version 2.0' 44 | url 'http://www.apache.org/licenses/LICENSE-2.0.txt' 45 | distribution 'repo' 46 | } 47 | } 48 | 49 | developers { 50 | developer { 51 | id 'diwakergupta' 52 | name 'Diwaker Gupta' 53 | email 'diwaker@floatingsun.net' 54 | } 55 | } 56 | } 57 | } 58 | -------------------------------------------------------------------------------- /config/checkstyle/checkstyle.xml: -------------------------------------------------------------------------------- 1 | 2 | 5 | 6 | 7 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 129 | 130 | 131 | 134 | 135 | 136 | 137 | 138 | 139 | 140 | 141 | 142 | 143 | 144 | 145 | 146 | 147 | 148 | 149 | 150 | 151 | 152 | 153 | 154 | 155 | 156 | 162 | 163 | 164 | 165 | 166 | 167 | 168 | 169 | 170 | 171 | 172 | 173 | 174 | 175 | 176 | 177 | 178 | 179 | 180 | 181 | 182 | 183 | 184 | 185 | 186 | 187 | 188 | 189 | 190 | 191 | 192 | 193 | 194 | 195 | 196 | 197 | 198 | 199 | 200 | 201 | 202 | 203 | 204 | 205 | 206 | 209 | 210 | 211 | 212 | 213 | 214 | 215 | 216 | 217 | 220 | 221 | 222 | 223 | 224 | 225 | 226 | 227 | 228 | 229 | 230 | 231 | 232 | 233 | 234 | 235 | 236 | 237 | 238 | 239 | 240 | 241 | 242 | 243 | 244 | 245 | 246 | 247 | 248 | 249 | 250 | 251 | 252 | 253 | 254 | 255 | 256 | 257 | 258 | 259 | 260 | 261 | 262 | 263 | 264 | 265 | 266 | 267 | 268 | 269 | 270 | 271 | 272 | 273 | 274 | 275 | 276 | 277 | 278 | 279 | 280 | 281 | 282 | 283 | 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-------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/diwakergupta/jetcd/db0a44a7d7adef3ec59d2806fdcae1f63c3e0b00/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | #Wed Oct 22 17:08:28 PDT 2014 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-2.1-bin.zip 7 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 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 | -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | rootProject.name = 'jetcd' 2 | -------------------------------------------------------------------------------- /src/main/java/jetcd/EtcdApi.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2013 Diwaker Gupta 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 jetcd; 18 | 19 | import retrofit.client.Response; 20 | import retrofit.http.DELETE; 21 | import retrofit.http.Field; 22 | import retrofit.http.FormUrlEncoded; 23 | import retrofit.http.GET; 24 | import retrofit.http.PUT; 25 | import retrofit.http.Path; 26 | import retrofit.http.Query; 27 | 28 | interface EtcdApi { 29 | @FormUrlEncoded 30 | @PUT("/v2/keys/{key}") 31 | EtcdResponse set(@Path("key") String key, 32 | @Field("value") String value, 33 | @Field("ttl") Integer ttl, 34 | @Field("dir") Boolean dir, 35 | @Query("prevValue") String prevValue) throws EtcdException; 36 | 37 | @GET("/version") 38 | Response version(); 39 | 40 | @GET("/v2/keys/{key}") 41 | EtcdResponse get(@Path("key") String key) throws EtcdException; 42 | 43 | @DELETE("/v2/keys/{key}") 44 | EtcdResponse delete(@Path("key") String key) throws EtcdException; 45 | } 46 | -------------------------------------------------------------------------------- /src/main/java/jetcd/EtcdClient.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2013 Diwaker Gupta 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 jetcd; 18 | 19 | import java.util.Map; 20 | 21 | /** The Etcd client API. */ 22 | public interface EtcdClient { 23 | /** 24 | * @return Version of the etcd instance 25 | * @throws EtcdException in case of an error 26 | */ 27 | String version() throws EtcdException; 28 | 29 | /** 30 | * Retrieve the value of the given key, if set. 31 | * 32 | * @param key Key to look up 33 | * @return value Value for the given key 34 | * @throws EtcdException in case of an error (e.g. key doesn't exist) 35 | */ 36 | String get(String key) throws EtcdException; 37 | 38 | /** 39 | * Set value for the given key. 40 | * 41 | * @param key Key to set value for 42 | * @param value New value for the key 43 | * @throws EtcdException in case of an error 44 | */ 45 | void set(String key, String value) throws EtcdException; 46 | 47 | /** 48 | * Set value for the given key with given TTL. 49 | * 50 | * @param key Key to set value for 51 | * @param value New value for the key 52 | * @param ttl Key will expire after these many seconds 53 | * @throws EtcdException in case of an error 54 | */ 55 | void set(String key, String value, int ttl) throws EtcdException; 56 | 57 | /** 58 | * Delete value for the given key. 59 | * 60 | * @param key Key to delete value for 61 | * @throws EtcdException in case of an error 62 | */ 63 | void delete(String key) throws EtcdException; 64 | 65 | /** 66 | * List directory at given path. 67 | * 68 | * @param path Given path 69 | * @return Map of key,value pairs under the path 70 | * @throws EtcdException in case of an error 71 | */ 72 | Map list(String path) throws EtcdException; 73 | 74 | /** 75 | * Compare the value at a given key and swap with newValue if the oldValue 76 | * matches. 77 | * 78 | * @param key Key to test/set value at 79 | * @param oldValue Old value 80 | * @param newValue New value 81 | * @throws EtcdException in case of an error 82 | */ 83 | void compareAndSwap(String key, String oldValue, String newValue) 84 | throws EtcdException; 85 | } 86 | -------------------------------------------------------------------------------- /src/main/java/jetcd/EtcdClientFactory.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2013 Diwaker Gupta 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 jetcd; 18 | 19 | import com.google.common.base.Optional; 20 | 21 | import retrofit.client.Client; 22 | 23 | /** Factory for Etcd clients. */ 24 | public final class EtcdClientFactory { 25 | private EtcdClientFactory() { 26 | // Factory 27 | } 28 | 29 | public static EtcdClient newInstance() { 30 | return newInstance("http://127.0.0.1:4001"); 31 | } 32 | 33 | public static EtcdClient newInstance(final String server) { 34 | return new EtcdClientImpl(Optional.absent(), server); 35 | } 36 | 37 | public static EtcdClient newInstance(final Client client, 38 | final String server) { 39 | return new EtcdClientImpl(Optional.of(client), server); 40 | } 41 | } 42 | -------------------------------------------------------------------------------- /src/main/java/jetcd/EtcdClientImpl.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2013 Diwaker Gupta 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 jetcd; 18 | 19 | import java.io.IOException; 20 | import java.io.InputStreamReader; 21 | import java.util.Map; 22 | 23 | import com.fasterxml.jackson.databind.DeserializationFeature; 24 | import com.fasterxml.jackson.databind.ObjectMapper; 25 | import com.google.common.base.Charsets; 26 | import com.google.common.base.Optional; 27 | import com.google.common.base.Preconditions; 28 | import com.google.common.base.Strings; 29 | import com.google.common.collect.ImmutableMap; 30 | import com.google.common.io.CharStreams; 31 | 32 | import retrofit.ErrorHandler; 33 | import retrofit.RestAdapter; 34 | import retrofit.RetrofitError; 35 | import retrofit.client.Client; 36 | import retrofit.converter.JacksonConverter; 37 | 38 | 39 | final class EtcdClientImpl implements EtcdClient { 40 | private static final ObjectMapper objectMapper = new ObjectMapper() 41 | .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); 42 | private final EtcdApi etcd; 43 | 44 | EtcdClientImpl(final Optional client, final String server) { 45 | RestAdapter.Builder builder = new RestAdapter.Builder() 46 | .setConverter(new JacksonConverter(objectMapper)) 47 | .setEndpoint(server) 48 | .setErrorHandler(new EtcdErrorHandler()); 49 | if (client.isPresent()) { 50 | builder.setClient(client.get()); 51 | } 52 | etcd = builder.build().create(EtcdApi.class); 53 | } 54 | 55 | @Override 56 | public String version() throws EtcdException { 57 | try (InputStreamReader reader = new InputStreamReader( 58 | etcd.version().getBody().in(), Charsets.UTF_8)) { 59 | return CharStreams.toString(reader); 60 | } catch (IOException e) { 61 | return "ERROR: " + e.getMessage(); 62 | } 63 | } 64 | 65 | @Override 66 | public String get(final String key) throws EtcdException { 67 | Preconditions.checkArgument(!Strings.isNullOrEmpty(key)); 68 | return etcd.get(key).getNode().getValue(); 69 | } 70 | 71 | @Override 72 | public void set(final String key, final String value) throws EtcdException { 73 | Preconditions.checkArgument(!Strings.isNullOrEmpty(key)); 74 | Preconditions.checkArgument(!Strings.isNullOrEmpty(value)); 75 | etcd.set(key, value, null, null, null); 76 | } 77 | 78 | @Override 79 | public void set(final String key, final String value, final int ttl) 80 | throws EtcdException { 81 | Preconditions.checkArgument(!Strings.isNullOrEmpty(key)); 82 | Preconditions.checkArgument(!Strings.isNullOrEmpty(value)); 83 | Preconditions.checkArgument(ttl > 0); 84 | etcd.set(key, value, ttl, null, null); 85 | } 86 | 87 | @Override 88 | public void delete(final String key) throws EtcdException { 89 | Preconditions.checkArgument(!Strings.isNullOrEmpty(key)); 90 | etcd.delete(key); 91 | } 92 | 93 | @Override 94 | public Map list(final String path) throws EtcdException { 95 | Preconditions.checkArgument(!Strings.isNullOrEmpty(path)); 96 | ImmutableMap.Builder builder = ImmutableMap.builder(); 97 | for (EtcdResponse.Node node : etcd.get(path).getNode().getNodes()) { 98 | builder.put(node.getKey(), node.getValue()); 99 | } 100 | return builder.build(); 101 | } 102 | 103 | @Override 104 | public void compareAndSwap(final String key, final String oldValue, 105 | final String newValue) throws EtcdException { 106 | Preconditions.checkArgument(!Strings.isNullOrEmpty(key)); 107 | Preconditions.checkArgument(!Strings.isNullOrEmpty(oldValue)); 108 | Preconditions.checkArgument(!Strings.isNullOrEmpty(newValue)); 109 | Preconditions.checkArgument(!oldValue.equals(newValue)); 110 | 111 | EtcdResponse response = etcd.set(key, newValue, null, null, oldValue); 112 | response.getNode().getValue(); 113 | } 114 | 115 | private static final class EtcdErrorHandler implements ErrorHandler { 116 | @Override 117 | public Throwable handleError(final RetrofitError cause) { 118 | if (cause.getResponse() == null) { 119 | return cause; 120 | } 121 | return (EtcdException) cause.getBodyAs(EtcdException.class); 122 | } 123 | } 124 | } 125 | -------------------------------------------------------------------------------- /src/main/java/jetcd/EtcdException.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2013 Diwaker Gupta 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 jetcd; 18 | 19 | import com.fasterxml.jackson.annotation.JsonProperty; 20 | 21 | /** An Etcd Exception. */ 22 | public final class EtcdException extends Exception { 23 | private final int errorCode; 24 | private final String cause; 25 | private final String message; 26 | private final long index; 27 | 28 | public EtcdException(@JsonProperty("errorCode") final int errorCode, 29 | @JsonProperty("cause") final String cause, 30 | @JsonProperty("message") final String message, 31 | @JsonProperty("index") final long index) { 32 | this.errorCode = errorCode; 33 | this.cause = cause; 34 | this.message = message; 35 | this.index = index; 36 | } 37 | 38 | public int getErrorCode() { 39 | return errorCode; 40 | } 41 | 42 | @Override 43 | public String toString() { 44 | return cause; 45 | } 46 | 47 | @Override 48 | public String getMessage() { 49 | return message; 50 | } 51 | 52 | public long getIndex() { 53 | return index; 54 | } 55 | } 56 | -------------------------------------------------------------------------------- /src/main/java/jetcd/EtcdResponse.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2013 Diwaker Gupta 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 jetcd; 18 | 19 | import java.util.List; 20 | 21 | import com.fasterxml.jackson.annotation.JsonProperty; 22 | 23 | /** An Etcd Response. */ 24 | public final class EtcdResponse { 25 | private final String action; 26 | private final Node node; 27 | 28 | EtcdResponse(@JsonProperty("action") final String action, 29 | @JsonProperty("node") final Node node) { 30 | this.action = action; 31 | this.node = node; 32 | } 33 | 34 | public String getAction() { 35 | return action; 36 | } 37 | 38 | public Node getNode() { 39 | return node; 40 | } 41 | 42 | static final class Node { 43 | private final String key; 44 | private final String value; 45 | private final long createdIndex; 46 | private final long modifiedIndex; 47 | private final long ttl; 48 | private final List nodes; 49 | 50 | Node(@JsonProperty("key") final String key, 51 | @JsonProperty("value") final String value, 52 | @JsonProperty("createdIndex") final long createdIndex, 53 | @JsonProperty("modifiedIndex") final long modifiedIndex, 54 | @JsonProperty("ttl") final long ttl, 55 | @JsonProperty("nodes") final List nodes) { 56 | this.key = key; 57 | this.value = value; 58 | this.createdIndex = createdIndex; 59 | this.modifiedIndex = modifiedIndex; 60 | this.ttl = ttl; 61 | this.nodes = nodes; 62 | } 63 | 64 | public String getKey() { 65 | return key; 66 | } 67 | 68 | public long getCreatedIndex() { 69 | return createdIndex; 70 | } 71 | 72 | public long getModifiedIndex() { 73 | return modifiedIndex; 74 | } 75 | 76 | public long getTtl() { 77 | return ttl; 78 | } 79 | 80 | public String getValue() { 81 | return value; 82 | } 83 | 84 | public List getNodes() { 85 | return nodes; 86 | } 87 | } 88 | } 89 | -------------------------------------------------------------------------------- /src/test/java/jetcd/EtcdClientTest.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2013 Diwaker Gupta 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 jetcd; 18 | 19 | import static org.assertj.core.api.Assertions.assertThat; 20 | import static org.junit.Assert.fail; 21 | 22 | import org.junit.Before; 23 | import org.junit.Test; 24 | 25 | import retrofit.RetrofitError; 26 | 27 | /** Tests for EtcdClient. */ 28 | public final class EtcdClientTest { 29 | private final EtcdClient client = EtcdClientFactory.newInstance(); 30 | 31 | @Before 32 | public void setUp() throws EtcdException { 33 | // Setup some keys 34 | try { 35 | client.set("hello", "world"); 36 | } catch (Exception e) { 37 | fail(); 38 | } 39 | } 40 | 41 | @Test 42 | public void testVersion() throws EtcdException { 43 | assertThat(client.version()).startsWith("etcd"); 44 | } 45 | 46 | @Test 47 | public void testGet() throws EtcdException { 48 | client.get("hello"); 49 | try { 50 | client.get("non-existent"); 51 | fail(); 52 | } catch (EtcdException e) { 53 | assertThat(e.getErrorCode()).isEqualTo(100); 54 | } 55 | } 56 | 57 | @Test 58 | public void testFailureWithoutEtcdServer() throws EtcdException { 59 | EtcdClient nonExistingClient = EtcdClientFactory.newInstance( 60 | "http://127.0.0.1:9999"); 61 | try { 62 | nonExistingClient.get("hello"); 63 | fail(); 64 | } catch (RetrofitError e) { 65 | assertThat(e.getResponse()).isNull(); 66 | assertThat(e.getKind()).isEqualTo(RetrofitError.Kind.NETWORK); 67 | } 68 | } 69 | 70 | @Test 71 | public void testSet() throws EtcdException { 72 | client.set("newKey", "newValue"); 73 | assertThat(client.get("newKey")).isEqualTo("newValue"); 74 | 75 | // Set a pre-existing key 76 | client.set("hello", "newValue"); 77 | assertThat(client.get("hello")).isEqualTo("newValue"); 78 | } 79 | 80 | @Test 81 | public void testSetWithTtl() throws Exception { 82 | client.set("newKey", "newValue", 1); 83 | assertThat(client.get("newKey")).isEqualTo("newValue"); 84 | 85 | // Wait for key to expire 86 | Thread.sleep(1500); 87 | try { 88 | client.get("newKey"); 89 | fail(); 90 | } catch (EtcdException e) { 91 | assertThat(e.getErrorCode()).isEqualTo(100); 92 | } 93 | } 94 | 95 | @Test 96 | public void testDelete() throws EtcdException { 97 | client.delete("hello"); 98 | try { 99 | client.get("hello"); 100 | fail(); 101 | } catch (EtcdException e) { 102 | assertThat(e.getErrorCode()).isEqualTo(100); 103 | } 104 | 105 | try { 106 | client.delete("non-existent"); 107 | fail(); 108 | } catch (EtcdException e) { 109 | assertThat(e.getErrorCode()).isEqualTo(100); 110 | } 111 | } 112 | 113 | @Test 114 | public void testList() throws EtcdException { 115 | client.set("b/bar", "baz"); 116 | client.set("b/foo", "baz"); 117 | assertThat(client.list("b")).hasSize(2) 118 | .containsEntry("/b/bar", "baz").containsEntry("/b/foo", "baz"); 119 | } 120 | 121 | @Test 122 | public void testCompareAndSwap() throws EtcdException { 123 | client.compareAndSwap("hello", "world", "new value"); 124 | assertThat(client.get("hello")).isEqualTo("new value"); 125 | 126 | try { 127 | client.compareAndSwap("hello", "bad old", "world"); 128 | fail(); 129 | } catch (EtcdException e) { 130 | assertThat(e.getErrorCode()).isEqualTo(101); 131 | } 132 | } 133 | } 134 | --------------------------------------------------------------------------------