/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.camel.component.aws.ddb;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.dynamodb.AmazonDynamoDB;
import com.amazonaws.services.dynamodb.AmazonDynamoDBClient;
import com.amazonaws.services.dynamodb.model.CreateTableRequest;
import com.amazonaws.services.dynamodb.model.DescribeTableRequest;
import com.amazonaws.services.dynamodb.model.KeySchema;
import com.amazonaws.services.dynamodb.model.KeySchemaElement;
import com.amazonaws.services.dynamodb.model.ProvisionedThroughput;
import com.amazonaws.services.dynamodb.model.ResourceNotFoundException;
import com.amazonaws.services.dynamodb.model.TableDescription;
import com.amazonaws.services.dynamodb.model.TableStatus;
import org.apache.camel.CamelContext;
import org.apache.camel.Component;
import org.apache.camel.Consumer;
import org.apache.camel.Processor;
import org.apache.camel.Producer;
import org.apache.camel.impl.ScheduledPollEndpoint;
import org.apache.camel.util.ObjectHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Defines the <a href="http://aws.amazon.com/dynamodb/">AWS DynamoDB endpoint</a>
*/
public class DdbEndpoint extends ScheduledPollEndpoint {
private static final Logger LOG = LoggerFactory.getLogger(DdbEndpoint.class);
private DdbConfiguration configuration;
private AmazonDynamoDB ddbClient;
@Deprecated
public DdbEndpoint(String uri, CamelContext context, DdbConfiguration configuration) {
super(uri, context);
this.configuration = configuration;
}
public DdbEndpoint(String uri, Component component, DdbConfiguration configuration) {
super(uri, component);
this.configuration = configuration;
}
public Consumer createConsumer(Processor processor) throws Exception {
throw new UnsupportedOperationException("You cannot receive messages from this endpoint");
}
public Producer createProducer() throws Exception {
return new DdbProducer(this);
}
public boolean isSingleton() {
return true;
}
@Override
public void doStart() throws Exception {
super.doStart();
ddbClient = configuration.getAmazonDDBClient() != null ? configuration.getAmazonDDBClient()
: createDdbClient();
if (ObjectHelper.isNotEmpty(configuration.getAmazonDdbEndpoint())) {
ddbClient.setEndpoint(configuration.getAmazonDdbEndpoint());
}
String tableName = getConfiguration().getTableName();
LOG.trace("Querying whether table [{}] already exists...", tableName);
try {
DescribeTableRequest request = new DescribeTableRequest().withTableName(tableName);
TableDescription tableDescription = ddbClient.describeTable(request).getTable();
if (!isTableActive(tableDescription)) {
waitForTableToBecomeAvailable(tableName);
}
LOG.trace("Table [{}] already exists", tableName);
return;
} catch (ResourceNotFoundException e) {
LOG.trace("Table [{}] doesn't exist yet", tableName);
LOG.trace("Creating table [{}]...", tableName);
TableDescription tableDescription = createTable(tableName);
if (!isTableActive(tableDescription)) {
waitForTableToBecomeAvailable(tableName);
}
LOG.trace("Table [{}] created", tableName);
}
}
private TableDescription createTable(String tableName) {
CreateTableRequest createTableRequest = new CreateTableRequest().withTableName(tableName)
.withKeySchema(new KeySchema(
new KeySchemaElement().withAttributeName(
configuration.getKeyAttributeName())
.withAttributeType(configuration.getKeyAttributeType())))
.withProvisionedThroughput(
new ProvisionedThroughput().withReadCapacityUnits(configuration.getReadCapacity())
.withWriteCapacityUnits(configuration.getWriteCapacity()));
return getDdbClient().createTable(createTableRequest).getTableDescription();
}
public DdbConfiguration getConfiguration() {
return configuration;
}
public AmazonDynamoDB getDdbClient() {
return ddbClient;
}
AmazonDynamoDB createDdbClient() {
AWSCredentials credentials = new BasicAWSCredentials(configuration.getAccessKey(),
configuration.getSecretKey());
AmazonDynamoDB client = new AmazonDynamoDBClient(credentials);
return client;
}
private void waitForTableToBecomeAvailable(String tableName) {
LOG.trace("Waiting for [{}] to become ACTIVE...", tableName);
long waitTime = 5 * 60 * 1000;
while (waitTime > 0) {
try {
Thread.sleep(1000 * 5);
waitTime -= 5000;
} catch (Exception e) {
}
try {
DescribeTableRequest request = new DescribeTableRequest().withTableName(tableName);
TableDescription tableDescription = getDdbClient().describeTable(request).getTable();
if (isTableActive(tableDescription)) {
LOG.trace("Table [{}] became active", tableName);
return;
}
LOG.trace("Table [{}] not active yet", tableName);
} catch (AmazonServiceException ase) {
if (!ase.getErrorCode().equalsIgnoreCase("ResourceNotFoundException")) {
throw ase;
}
}
}
throw new RuntimeException("Table " + tableName + " never went active");
}
private boolean isTableActive(TableDescription tableDescription) {
return tableDescription.getTableStatus().equals(TableStatus.ACTIVE.toString());
}
}