[Java] JUnit with DynamoDBLocal

先設定 build.gradle：

// build.gradle
repositories {
    maven {
        // dynamodb local url
        url 'https://s3-us-west-2.amazonaws.com/dynamodb-local/release'
    }

    testCompile (
        'org.junit.jupiter:junit-jupiter-api:5.2.0',
        'com.amazonaws:DynamoDBLocal:1.11.119'
    )

    testRuntime (
        // junit5
        'org.junit.jupiter:junit-jupiter-engine:5.2.0',
        // dynamodb local
        'com.almworks.sqlite4java:libsqlite4java-linux-i386:1.0.392',
        'com.almworks.sqlite4java:libsqlite4java-osx:1.0.392'
    )
}
// link native sqlite4java
task copyNativeDeps(type: Copy) {
    from (configurations.testCompile) {
        include '*.dylib'
        include '*.so'
        include '*.dll'
    }
    into 'build/libs'
}

test {
    useJUnitPlatform()
    dependsOn copyNativeDeps
    doFirst {
        // setup sqlite4java path
        systemProperty 'java.library.path', 'build/libs'
    }
    testLogging {
        showStandardStreams = true
    }
}

接下來就是測試：

package example;

import java.util.ArrayList;
import java.util.List;

import org.junit.jupiter.api.Test;

import com.amazonaws.services.dynamodbv2.AmazonDynamoDB;
import com.amazonaws.services.dynamodbv2.document.DynamoDB;
import com.amazonaws.services.dynamodbv2.document.Table;
import com.amazonaws.services.dynamodbv2.local.embedded.DynamoDBEmbedded;
import com.amazonaws.services.dynamodbv2.model.AttributeDefinition;
import com.amazonaws.services.dynamodbv2.model.CreateTableRequest;
import com.amazonaws.services.dynamodbv2.model.KeySchemaElement;
import com.amazonaws.services.dynamodbv2.model.KeyType;
import com.amazonaws.services.dynamodbv2.model.ProvisionedThroughput;

public class DynamoDBLocalTest {

    @Test
    public void createTable() throws Exception {
        AmazonDynamoDB client = DynamoDBEmbedded.create().amazonDynamoDB();
        DynamoDB dynamodb = new DynamoDB(client);
        String tableName = "Employee";

        List keySchema = new ArrayList();
        keySchema.add(new KeySchemaElement().withAttributeName("Name").withKeyType(KeyType.HASH));

        List attributeDefinitions = new ArrayList();
        attributeDefinitions.add(new AttributeDefinition().withAttributeName("Name").withAttributeType("S"));

        CreateTableRequest request = new CreateTableRequest().withTableName(tableName).withKeySchema(keySchema)
                .withProvisionedThroughput(
                        new ProvisionedThroughput().withReadCapacityUnits(1L).withWriteCapacityUnits(1L))
                .withAttributeDefinitions(attributeDefinitions);

        System.out.println("Issuing CreateTable request for " + tableName);
        Table table = dynamodb.createTable(request);
        System.out.println("Waiting for " + tableName + " to be created...this may take a while...");
        table.waitForActive();

        System.out.println(dynamodb.getTable(tableName).describe());
    }

}

參考資料：

• AWS文件: 设置 DynamoDB Local
• StackOverflow: Run Dynamodb local as part of a Gradle Java project
• AWS文件: 使用适用于 Java 的 AWS 开发工具包创建示例表和上传数据

系列：

• [Java] AWS Lambda 入門
• [Java] AWS Lambda + DynamoDB
• AWS Lambda + API Gateway
• [Java] JAX-RS on AWS Lambda
• [Java] JUnit with DynamoDBLocal