├── LICENSE ├── README.md ├── images └── architecture.jpg ├── pom.xml └── src └── main ├── java └── com │ └── amazonaws │ └── serverless │ ├── dao │ ├── DynamoDBEventDao.java │ └── EventDao.java │ ├── domain │ └── Event.java │ ├── function │ └── EventFunctions.java │ ├── manager │ └── DynamoDBManager.java │ ├── pojo │ ├── City.java │ └── Team.java │ └── util │ └── Consts.java └── resources └── log4j.properties /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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In a production deployment, you would use Amazon API Gateway to proxy RESTful API requests to the Lambda functions, each of which corresponds to a single API call. When API Gateway is added, the architecture is as follows: 5 | 6 | ![Architecture](images/architecture.jpg) 7 | 8 | By using Lambda together with DynamoDB and API Gateway, there is no need to deploy or manage servers for either the application tier or database tier. If the front end consists of mobile devices and a web app statically hosted on Amazon S3, the result is a completely serverless architecture with no need to deploy or manage servers anywhere in the system, in either the front end or back end. For further information, see the following blog post series: 9 | - [Serverless Architectures with Java 8, AWS Lambda, and Amazon DynamoDB — Part 1](https://aws.amazon.com/blogs/startups/serverless-architectures-with-java-8-aws-lambda-and-amazon-dynamodb-part-1/). 10 | - [Serverless Architectures with Java 8, AWS Lambda, and Amazon DynamoDB — Part 2](https://aws.amazon.com/blogs/startups/serverless-architectures-with-java-8-aws-lambda-and-amazon-dynamodb-part-2/). 11 | 12 | ### EXAMPLE USE CASE: 13 | 14 | The example use case is a company which maintains a catalog of sports events, and has decided 15 | to build an API for that catalog backed by DynamoDB. For each event, the company needs to 16 | have a record that includes the name of the home team, the event date, the name of the other 17 | (away) team, the sport involved (e.g. basketball, baseball etc.), city, country, etc. The 18 | home page of the company’s application must display all local events for a user’s favorite 19 | home team, as well as all other sports events in the user’s home city. Other queries regarding 20 | events must be supported, but queries to support the home page are the most important. 21 | 22 | To keep this example simple, only a single Event table in DynamoDB is used to model the data, 23 | which essentially is a catalog of available events. Within this table, events are modeled using 24 | a composite key having the home team name as partition key, and event date as sort key, with 25 | the away team name as an ordinary attribute. This allows an event to be modeled as a single item 26 | in the table. 27 | 28 | The primary prerequisite for running the code for this example is to create a table in DynamoDB. 29 | The following attributes are required, with types indicated and whether the attribute functions 30 | as a partition or sort key for the table or a Global Secondary Index (GSI): 31 | 32 | homeTeam: String, Partition Key 33 | eventDate: Number, Sort Key 34 | awayTeam: String, GSI Partition Key 35 | city: String, GSI Partition Key 36 | eventId: Number 37 | sport: String 38 | country: String 39 | 40 | 41 | ### DEPLOYMENT NOTE: 42 | 43 | Follow these steps to deploy the application: 44 | 45 | - Create a DynamoDB table with the keys and attributes mentioned above. 46 | 47 | - Create Lambda functions, one for each handler in the EventFunctions class. 48 | 49 | - Create a API Gateway API. Note that even if you don't do this step, you can still test the Lambda functions via the Lambda console "test function" tab. 50 | 51 | To automate deployment of the Lambda functions and API Gateway, consider using AWS SAM (Serverless Application Model). Using SAM can simplify deploying an API, such as this one, built with a single code base that supports multiple Lambda functions. See http://docs.aws.amazon.com/lambda/latest/dg/deploying-lambda-apps.html. 52 | 53 | -------------------------------------------------------------------------------- /images/architecture.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/aws-samples/lambda-java8-dynamodb/15a015dda4d63df2b03e30e00057bc7cc432776d/images/architecture.jpg -------------------------------------------------------------------------------- /pom.xml: -------------------------------------------------------------------------------- 1 | 2 | 5 | 4.0.0 6 | 7 | com.amazonaws 8 | LambdaDynamoDBJava8 9 | 1.0 10 | jar 11 | 12 | 13 | 14 | 1.8 15 | UTF-8 16 | 17 | 18 | 19 | 20 | 21 | com.amazonaws 22 | aws-lambda-java-core 23 | 1.1.0 24 | 25 | 26 | 27 | com.amazonaws 28 | aws-lambda-java-log4j 29 | 1.0.0 30 | 31 | 32 | 33 | com.amazonaws 34 | aws-java-sdk-dynamodb 35 | 1.11.6 36 | 37 | 38 | 39 | 40 | 41 | 42 | ${project.artifactId} 43 | 44 | 45 | 46 | 47 | org.apache.maven.plugins 48 | maven-shade-plugin 49 | 2.3 50 | 51 | false 52 | 53 | 54 | 55 | package 56 | 57 | shade 58 | 59 | 60 | 61 | 62 | 63 | 64 | org.apache.maven.plugins 65 | maven-compiler-plugin 66 | 3.1 67 | 68 | 1.8 69 | 1.8 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | -------------------------------------------------------------------------------- /src/main/java/com/amazonaws/serverless/dao/DynamoDBEventDao.java: -------------------------------------------------------------------------------- 1 | // Copyright 2016 Amazon.com, Inc. or its affiliates. All Rights Reserved. 2 | // 3 | // Licensed under the Apache License, Version 2.0 (the "License"). You may 4 | // not use this file except in compliance with the License. A copy of the 5 | // License is located at 6 | // 7 | // http://aws.amazon.com/apache2.0/ 8 | // 9 | // or in the "license" file accompanying this file. This file is distributed 10 | // on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 11 | // express or implied. See the License for the specific language governing 12 | // permissions and limitations under the License. 13 | 14 | 15 | package com.amazonaws.serverless.dao; 16 | 17 | 18 | import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMapper; 19 | import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBQueryExpression; 20 | import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBScanExpression; 21 | import com.amazonaws.services.dynamodbv2.model.AttributeValue; 22 | import com.amazonaws.serverless.domain.Event; 23 | import com.amazonaws.serverless.manager.DynamoDBManager; 24 | import org.apache.log4j.Logger; 25 | 26 | import java.util.*; 27 | 28 | 29 | public class DynamoDBEventDao implements EventDao { 30 | 31 | private static final Logger log = Logger.getLogger(DynamoDBEventDao.class); 32 | 33 | private static final DynamoDBMapper mapper = DynamoDBManager.mapper(); 34 | 35 | private static volatile DynamoDBEventDao instance; 36 | 37 | 38 | private DynamoDBEventDao() { } 39 | 40 | public static DynamoDBEventDao instance() { 41 | 42 | if (instance == null) { 43 | synchronized(DynamoDBEventDao.class) { 44 | if (instance == null) 45 | instance = new DynamoDBEventDao(); 46 | } 47 | } 48 | return instance; 49 | } 50 | 51 | @Override 52 | public List findAllEvents() { 53 | return mapper.scan(Event.class, new DynamoDBScanExpression()); 54 | } 55 | 56 | @Override 57 | public List findEventsByCity(String city) { 58 | 59 | Map eav = new HashMap<>(); 60 | eav.put(":v1", new AttributeValue().withS(city)); 61 | 62 | DynamoDBQueryExpression query = new DynamoDBQueryExpression() 63 | .withIndexName(Event.CITY_INDEX) 64 | .withConsistentRead(false) 65 | .withKeyConditionExpression("city = :v1") 66 | .withExpressionAttributeValues(eav); 67 | 68 | return mapper.query(Event.class, query); 69 | 70 | 71 | // NOTE: without an index, this query would require a full table scan with a filter: 72 | /* 73 | DynamoDBScanExpression scanExpression = new DynamoDBScanExpression() 74 | .withFilterExpression("city = :val1") 75 | .withExpressionAttributeValues(eav); 76 | 77 | return mapper.scan(Event.class, scanExpression); 78 | */ 79 | 80 | } 81 | 82 | @Override 83 | public List findEventsByTeam(String team) { 84 | 85 | DynamoDBQueryExpression homeQuery = new DynamoDBQueryExpression<>(); 86 | Event eventKey = new Event(); 87 | eventKey.setHomeTeam(team); 88 | homeQuery.setHashKeyValues(eventKey); 89 | List homeEvents = mapper.query(Event.class, homeQuery); 90 | 91 | Map eav = new HashMap<>(); 92 | eav.put(":v1", new AttributeValue().withS(team)); 93 | DynamoDBQueryExpression awayQuery = new DynamoDBQueryExpression() 94 | .withIndexName(Event.AWAY_TEAM_INDEX) 95 | .withConsistentRead(false) 96 | .withKeyConditionExpression("awayTeam = :v1") 97 | .withExpressionAttributeValues(eav); 98 | 99 | List awayEvents = mapper.query(Event.class, awayQuery); 100 | 101 | // need to create a new list because PaginatedList from query is immutable 102 | List allEvents = new LinkedList<>(); 103 | allEvents.addAll(homeEvents); 104 | allEvents.addAll(awayEvents); 105 | allEvents.sort( (e1, e2) -> e1.getEventDate() <= e2.getEventDate() ? -1 : 1 ); 106 | 107 | return allEvents; 108 | } 109 | 110 | @Override 111 | public Optional findEventByTeamAndDate(String team, Long eventDate) { 112 | 113 | Event event = mapper.load(Event.class, team, eventDate); 114 | 115 | return Optional.ofNullable(event); 116 | } 117 | 118 | @Override 119 | public void saveOrUpdateEvent(Event event) { 120 | 121 | mapper.save(event); 122 | } 123 | 124 | @Override 125 | public void deleteEvent(String team, Long eventDate) { 126 | 127 | Optional oEvent = findEventByTeamAndDate(team, eventDate); 128 | if (oEvent.isPresent()) { 129 | mapper.delete(oEvent.get()); 130 | } 131 | else { 132 | log.error("Could not delete event, no such team and date combination"); 133 | throw new IllegalArgumentException("Delete failed for nonexistent event"); 134 | } 135 | } 136 | } 137 | -------------------------------------------------------------------------------- /src/main/java/com/amazonaws/serverless/dao/EventDao.java: -------------------------------------------------------------------------------- 1 | // Copyright 2016 Amazon.com, Inc. or its affiliates. All Rights Reserved. 2 | // 3 | // Licensed under the Apache License, Version 2.0 (the "License"). You may 4 | // not use this file except in compliance with the License. A copy of the 5 | // License is located at 6 | // 7 | // http://aws.amazon.com/apache2.0/ 8 | // 9 | // or in the "license" file accompanying this file. This file is distributed 10 | // on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 11 | // express or implied. See the License for the specific language governing 12 | // permissions and limitations under the License. 13 | 14 | 15 | package com.amazonaws.serverless.dao; 16 | 17 | 18 | import com.amazonaws.serverless.domain.Event; 19 | 20 | import java.util.List; 21 | import java.util.Optional; 22 | 23 | 24 | public interface EventDao { 25 | 26 | List findAllEvents(); 27 | 28 | List findEventsByCity(String city); 29 | 30 | List findEventsByTeam(String team); 31 | 32 | Optional findEventByTeamAndDate(String team, Long eventDate); 33 | 34 | void saveOrUpdateEvent(Event event); 35 | 36 | void deleteEvent(String team, Long eventDate); 37 | 38 | } 39 | -------------------------------------------------------------------------------- /src/main/java/com/amazonaws/serverless/domain/Event.java: -------------------------------------------------------------------------------- 1 | // Copyright 2016 Amazon.com, Inc. or its affiliates. All Rights Reserved. 2 | // 3 | // Licensed under the Apache License, Version 2.0 (the "License"). You may 4 | // not use this file except in compliance with the License. A copy of the 5 | // License is located at 6 | // 7 | // http://aws.amazon.com/apache2.0/ 8 | // 9 | // or in the "license" file accompanying this file. This file is distributed 10 | // on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 11 | // express or implied. See the License for the specific language governing 12 | // permissions and limitations under the License. 13 | 14 | 15 | package com.amazonaws.serverless.domain; 16 | 17 | 18 | import com.amazonaws.services.dynamodbv2.datamodeling.*; 19 | 20 | import java.io.Serializable; 21 | 22 | 23 | @DynamoDBTable(tableName = "EVENT") 24 | public class Event implements Serializable { 25 | 26 | private static final long serialVersionUID = -8243145429438016232L; 27 | public static final String CITY_INDEX = "City-Index"; 28 | public static final String AWAY_TEAM_INDEX = "AwayTeam-Index"; 29 | 30 | @DynamoDBAttribute 31 | private Long eventId; 32 | 33 | @DynamoDBRangeKey 34 | private Long eventDate; 35 | 36 | @DynamoDBAttribute 37 | private String sport; 38 | 39 | @DynamoDBHashKey 40 | private String homeTeam; 41 | 42 | @DynamoDBIndexHashKey(globalSecondaryIndexName = AWAY_TEAM_INDEX) 43 | private String awayTeam; 44 | 45 | @DynamoDBIndexHashKey(globalSecondaryIndexName = CITY_INDEX) 46 | private String city; 47 | 48 | @DynamoDBAttribute 49 | private String country; 50 | 51 | public Event() { } 52 | 53 | public Event(String team, Long date) { 54 | this.homeTeam = team; 55 | this.eventDate = date; 56 | } 57 | 58 | public Event(Long eventId, Long eventDate, String sport, String homeTeam, String awayTeam, String city, String country) { 59 | this.eventId = eventId; 60 | this.eventDate = eventDate; 61 | this.sport = sport; 62 | this.homeTeam = homeTeam; 63 | this.awayTeam = awayTeam; 64 | this.city = city; 65 | this.country = country; 66 | } 67 | 68 | 69 | public Long getEventId() { 70 | return eventId; 71 | } 72 | 73 | public void setEventId(Long eventId) { 74 | this.eventId = eventId; 75 | } 76 | 77 | public Long getEventDate() { 78 | return eventDate; 79 | } 80 | 81 | public void setEventDate(Long eventDate) { 82 | this.eventDate = eventDate; 83 | } 84 | 85 | public String getSport() { 86 | return sport; 87 | } 88 | 89 | public void setSport(String sport) { 90 | this.sport = sport; 91 | } 92 | 93 | public String getHomeTeam() { 94 | return homeTeam; 95 | } 96 | 97 | public void setHomeTeam(String homeTeam) { 98 | this.homeTeam = homeTeam; 99 | } 100 | 101 | public String getAwayTeam() { 102 | return awayTeam; 103 | } 104 | 105 | public void setAwayTeam(String awayTeam) { 106 | this.awayTeam = awayTeam; 107 | } 108 | 109 | public String getCity() { 110 | return city; 111 | } 112 | 113 | public void setCity(String city) { 114 | this.city = city; 115 | } 116 | 117 | public String getCountry() { 118 | return country; 119 | } 120 | 121 | public void setCountry(String country) { 122 | this.country = country; 123 | } 124 | 125 | } 126 | -------------------------------------------------------------------------------- /src/main/java/com/amazonaws/serverless/function/EventFunctions.java: -------------------------------------------------------------------------------- 1 | // Copyright 2016 Amazon.com, Inc. or its affiliates. All Rights Reserved. 2 | // 3 | // Licensed under the Apache License, Version 2.0 (the "License"). You may 4 | // not use this file except in compliance with the License. A copy of the 5 | // License is located at 6 | // 7 | // http://aws.amazon.com/apache2.0/ 8 | // 9 | // or in the "license" file accompanying this file. This file is distributed 10 | // on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 11 | // express or implied. See the License for the specific language governing 12 | // permissions and limitations under the License. 13 | 14 | 15 | package com.amazonaws.serverless.function; 16 | 17 | 18 | import java.io.UnsupportedEncodingException; 19 | import java.net.URLDecoder; 20 | import java.util.List; 21 | 22 | import com.amazonaws.serverless.dao.DynamoDBEventDao; 23 | import com.amazonaws.serverless.pojo.Team; 24 | import com.amazonaws.serverless.util.Consts; 25 | import org.apache.log4j.Logger; 26 | 27 | import com.amazonaws.serverless.domain.Event; 28 | import com.amazonaws.serverless.pojo.City; 29 | 30 | 31 | public class EventFunctions { 32 | 33 | private static final Logger log = Logger.getLogger(EventFunctions.class); 34 | 35 | private static final DynamoDBEventDao eventDao = DynamoDBEventDao.instance(); 36 | 37 | 38 | public List getAllEventsHandler() { 39 | 40 | log.info("GetAllEvents invoked to scan table for ALL events"); 41 | List events = eventDao.findAllEvents(); 42 | log.info("Found " + events.size() + " total events."); 43 | return events; 44 | } 45 | 46 | public List getEventsForTeam(Team team) throws UnsupportedEncodingException { 47 | 48 | if (null == team || team.getTeamName().isEmpty() || team.getTeamName().equals(Consts.UNDEFINED)) { 49 | log.error("GetEventsForTeam received null or empty team name"); 50 | throw new IllegalArgumentException("Team name cannot be null or empty"); 51 | } 52 | 53 | String name = URLDecoder.decode(team.getTeamName(), "UTF-8"); 54 | log.info("GetEventsForTeam invoked for team with name = " + name); 55 | List events = eventDao.findEventsByTeam(name); 56 | log.info("Found " + events.size() + " events for team = " + name); 57 | 58 | return events; 59 | } 60 | 61 | public List getEventsForCity(City city) throws UnsupportedEncodingException { 62 | 63 | if (null == city || city.getCityName().isEmpty() || city.getCityName().equals(Consts.UNDEFINED)) { 64 | log.error("GetEventsForCity received null or empty city name"); 65 | throw new IllegalArgumentException("City name cannot be null or empty"); 66 | } 67 | 68 | String name = URLDecoder.decode(city.getCityName(), "UTF-8"); 69 | log.info("GetEventsForCity invoked for city with name = " + name); 70 | List events = eventDao.findEventsByCity(name); 71 | log.info("Found " + events.size() + " events for city = " + name); 72 | 73 | return events; 74 | } 75 | 76 | public void saveOrUpdateEvent(Event event) { 77 | 78 | if (null == event) { 79 | log.error("SaveEvent received null input"); 80 | throw new IllegalArgumentException("Cannot save null object"); 81 | } 82 | 83 | log.info("Saving or updating event for team = " + event.getHomeTeam() + " , date = " + event.getEventDate()); 84 | eventDao.saveOrUpdateEvent(event); 85 | log.info("Successfully saved/updated event"); 86 | } 87 | 88 | public void deleteEvent(Event event) { 89 | 90 | if (null == event) { 91 | log.error("DeleteEvent received null input"); 92 | throw new IllegalArgumentException("Cannot delete null object"); 93 | } 94 | 95 | log.info("Deleting event for team = " + event.getHomeTeam() + " , date = " + event.getEventDate()); 96 | eventDao.deleteEvent(event.getHomeTeam(), event.getEventDate()); 97 | log.info("Successfully deleted event"); 98 | } 99 | 100 | } 101 | -------------------------------------------------------------------------------- /src/main/java/com/amazonaws/serverless/manager/DynamoDBManager.java: -------------------------------------------------------------------------------- 1 | // Copyright 2016 Amazon.com, Inc. or its affiliates. All Rights Reserved. 2 | // 3 | // Licensed under the Apache License, Version 2.0 (the "License"). You may 4 | // not use this file except in compliance with the License. A copy of the 5 | // License is located at 6 | // 7 | // http://aws.amazon.com/apache2.0/ 8 | // 9 | // or in the "license" file accompanying this file. This file is distributed 10 | // on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 11 | // express or implied. See the License for the specific language governing 12 | // permissions and limitations under the License. 13 | 14 | 15 | package com.amazonaws.serverless.manager; 16 | 17 | 18 | import com.amazonaws.regions.Region; 19 | import com.amazonaws.regions.Regions; 20 | import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient; 21 | import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMapper; 22 | 23 | 24 | public class DynamoDBManager { 25 | 26 | private static volatile DynamoDBManager instance; 27 | 28 | private static DynamoDBMapper mapper; 29 | 30 | private DynamoDBManager() { 31 | 32 | AmazonDynamoDBClient client = new AmazonDynamoDBClient(); 33 | client.setRegion(Region.getRegion(Regions.US_EAST_1)); 34 | mapper = new DynamoDBMapper(client); 35 | } 36 | 37 | public static DynamoDBManager instance() { 38 | 39 | if (instance == null) { 40 | synchronized(DynamoDBManager.class) { 41 | if (instance == null) 42 | instance = new DynamoDBManager(); 43 | } 44 | } 45 | 46 | return instance; 47 | } 48 | 49 | public static DynamoDBMapper mapper() { 50 | 51 | DynamoDBManager manager = instance(); 52 | return manager.mapper; 53 | } 54 | 55 | } 56 | -------------------------------------------------------------------------------- /src/main/java/com/amazonaws/serverless/pojo/City.java: -------------------------------------------------------------------------------- 1 | // Copyright 2016 Amazon.com, Inc. or its affiliates. All Rights Reserved. 2 | // 3 | // Licensed under the Apache License, Version 2.0 (the "License"). You may 4 | // not use this file except in compliance with the License. A copy of the 5 | // License is located at 6 | // 7 | // http://aws.amazon.com/apache2.0/ 8 | // 9 | // or in the "license" file accompanying this file. This file is distributed 10 | // on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 11 | // express or implied. See the License for the specific language governing 12 | // permissions and limitations under the License. 13 | 14 | 15 | package com.amazonaws.serverless.pojo; 16 | 17 | /** 18 | * 19 | * This simple POJO is for use with Amazon API Gateway so the 20 | * Lambda functions can receive JSON objects from API Gateway, 21 | * rather than simple Strings. 22 | * 23 | */ 24 | public class City { 25 | 26 | private String cityName; 27 | 28 | public String getCityName() { 29 | return cityName; 30 | } 31 | 32 | public void setCityName(String cityName) { 33 | this.cityName = cityName; 34 | } 35 | 36 | } 37 | -------------------------------------------------------------------------------- /src/main/java/com/amazonaws/serverless/pojo/Team.java: -------------------------------------------------------------------------------- 1 | // Copyright 2016 Amazon.com, Inc. or its affiliates. All Rights Reserved. 2 | // 3 | // Licensed under the Apache License, Version 2.0 (the "License"). You may 4 | // not use this file except in compliance with the License. A copy of the 5 | // License is located at 6 | // 7 | // http://aws.amazon.com/apache2.0/ 8 | // 9 | // or in the "license" file accompanying this file. This file is distributed 10 | // on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 11 | // express or implied. See the License for the specific language governing 12 | // permissions and limitations under the License. 13 | 14 | 15 | package com.amazonaws.serverless.pojo; 16 | 17 | /** 18 | * 19 | * This simple POJO is for use with Amazon API Gateway so the 20 | * Lambda functions can receive JSON objects from API Gateway, 21 | * rather than simple Strings. 22 | * 23 | */ 24 | public class Team { 25 | 26 | private String teamName; 27 | 28 | 29 | public String getTeamName() { 30 | return teamName; 31 | } 32 | 33 | public void setTeamName(String teamName) { 34 | this.teamName = teamName; 35 | } 36 | 37 | } 38 | -------------------------------------------------------------------------------- /src/main/java/com/amazonaws/serverless/util/Consts.java: -------------------------------------------------------------------------------- 1 | // Copyright 2016 Amazon.com, Inc. or its affiliates. All Rights Reserved. 2 | // 3 | // Licensed under the Apache License, Version 2.0 (the "License"). You may 4 | // not use this file except in compliance with the License. A copy of the 5 | // License is located at 6 | // 7 | // http://aws.amazon.com/apache2.0/ 8 | // 9 | // or in the "license" file accompanying this file. This file is distributed 10 | // on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 11 | // express or implied. See the License for the specific language governing 12 | // permissions and limitations under the License. 13 | 14 | 15 | package com.amazonaws.serverless.util; 16 | 17 | /** 18 | * 19 | * Static constants class 20 | * 21 | */ 22 | public class Consts { 23 | 24 | private Consts() {} // callers can't instantiate class itself 25 | 26 | // "undefined" is the string sent by the Amazon API Gateway console when using 27 | // the console's test functionality if an API parameter is left blank 28 | public static final String UNDEFINED = "undefined"; 29 | 30 | } 31 | -------------------------------------------------------------------------------- /src/main/resources/log4j.properties: -------------------------------------------------------------------------------- 1 | log = . 2 | log4j.rootLogger = INFO, LAMBDA 3 | 4 | #Define the LAMBDA appender 5 | log4j.appender.LAMBDA=com.amazonaws.services.lambda.runtime.log4j.LambdaAppender 6 | log4j.appender.LAMBDA.layout=org.apache.log4j.PatternLayout 7 | log4j.appender.LAMBDA.layout.conversionPattern=%d{yyyy-MM-dd HH:mm:ss} <%X{AWSRequestId}> %-5p %c{1}:%L - %m%n --------------------------------------------------------------------------------