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Merge pull request #1173 from sunilgulabani/master 

BAEL-650 Lambda and DynamoDB
This commit is contained in:
pedja4 2017-02-23 12:03:50 +01:00 committed by GitHub
parent 41fff7c0d3 d267d39321
commit a6f2451794
4 changed files with 158 additions and 3 deletions
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25
aws/pom.xml
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@ -7,17 +7,36 @@
<packaging>jar</packaging>
<name>aws</name>
<properties>
<commons-io.version>2.5</commons-io.version>
<aws-lambda-java-events.version>1.3.0</aws-lambda-java-events.version>
<aws-lambda-java-core.version>1.1.0</aws-lambda-java-core.version>
<gson.version>2.8.0</gson.version>
</properties>
<dependencies>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-lambda-java-core</artifactId>
<version>1.1.0</version>
<version>${aws-lambda-java-core.version}</version>
</dependency>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-lambda-java-events</artifactId>
<version>${aws-lambda-java-events.version}</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
<version>${commons-io.version}</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>${gson.version}</version>
</dependency>
</dependencies>
@ -26,7 +45,7 @@
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.3</version>
<version>3.0.0</version>
<configuration>
<createDependencyReducedPom>false</createDependencyReducedPom>
</configuration>

49
aws/src/main/java/com/baeldung/lambda/dynamodb/SavePersonHandler.java Normal file
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@ -0,0 +1,49 @@
package com.baeldung.lambda.dynamodb;
import com.amazonaws.regions.Region;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient;
import com.amazonaws.services.dynamodbv2.document.DynamoDB;
import com.amazonaws.services.dynamodbv2.document.Item;
import com.amazonaws.services.dynamodbv2.document.PutItemOutcome;
import com.amazonaws.services.dynamodbv2.document.spec.PutItemSpec;
import com.amazonaws.services.dynamodbv2.model.ConditionalCheckFailedException;
import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;
import com.baeldung.lambda.dynamodb.bean.PersonRequest;
import com.baeldung.lambda.dynamodb.bean.PersonResponse;
public class SavePersonHandler implements RequestHandler<PersonRequest, PersonResponse> {
private DynamoDB dynamoDb;
private String DYNAMODB_TABLE_NAME = "Person";
private Regions REGION = Regions.US_WEST_2;
public PersonResponse handleRequest(PersonRequest personRequest, Context context) {
this.initDynamoDbClient();
persistData(personRequest);
PersonResponse personResponse = new PersonResponse();
personResponse.setMessage("Saved Successfully!!!");
return personResponse;
}
private PutItemOutcome persistData(PersonRequest personRequest) throws ConditionalCheckFailedException {
return this.dynamoDb.getTable(DYNAMODB_TABLE_NAME)
.putItem(
new PutItemSpec().withItem(new Item()
.withNumber("id", personRequest.getId())
.withString("firstName", personRequest.getFirstName())
.withString("lastName", personRequest.getLastName())
.withNumber("age", personRequest.getAge())
.withString("address", personRequest.getAddress())));
}
private void initDynamoDbClient() {
AmazonDynamoDBClient client = new AmazonDynamoDBClient();
client.setRegion(Region.getRegion(REGION));
this.dynamoDb = new DynamoDB(client);
}
}

67
aws/src/main/java/com/baeldung/lambda/dynamodb/bean/PersonRequest.java Normal file
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@ -0,0 +1,67 @@
package com.baeldung.lambda.dynamodb.bean;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
public class PersonRequest {
private int id;
private String firstName;
private String lastName;
private int age;
private String address;
public static void main(String[] args) {
PersonRequest personRequest = new PersonRequest();
personRequest.setId(1);
personRequest.setFirstName("John");
personRequest.setLastName("Doe");
personRequest.setAge(30);
personRequest.setAddress("United States");
System.out.println(personRequest);
}
public String toString() {
final Gson gson = new GsonBuilder().setPrettyPrinting().create();
return gson.toJson(this);
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}

20
aws/src/main/java/com/baeldung/lambda/dynamodb/bean/PersonResponse.java Normal file
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@ -0,0 +1,20 @@
package com.baeldung.lambda.dynamodb.bean;
import com.google.gson.Gson;
public class PersonResponse {
private String message;
public String toString() {
final Gson gson = new Gson();
return gson.toJson(this);
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}