/*
* Copyright 2012-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Amazon Software License (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/asl/
*
* or in the "license" file accompanying this file. This file 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 com.amazonaws.services.kinesis.metrics.impl;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.amazonaws.AmazonClientException;
import com.amazonaws.services.cloudwatch.AmazonCloudWatch;
import com.amazonaws.services.cloudwatch.model.MetricDatum;
import com.amazonaws.services.cloudwatch.model.PutMetricDataRequest;
/**
* Default implementation for publishing metrics to CloudWatch.
*/
public class DefaultCWMetricsPublisher implements ICWMetricsPublisher<CWMetricKey> {
private static final Log LOG = LogFactory.getLog(CWPublisherRunnable.class);
// CloudWatch API has a limit of 20 MetricDatums per request
private static final int BATCH_SIZE = 20;
private final String namespace;
private final AmazonCloudWatch cloudWatchClient;
public DefaultCWMetricsPublisher(AmazonCloudWatch cloudWatchClient, String namespace) {
this.cloudWatchClient = cloudWatchClient;
this.namespace = namespace;
}
@Override
public void publishMetrics(List<MetricDatumWithKey<CWMetricKey>> dataToPublish) {
for (int startIndex = 0; startIndex < dataToPublish.size(); startIndex += BATCH_SIZE) {
int endIndex = Math.min(dataToPublish.size(), startIndex + BATCH_SIZE);
PutMetricDataRequest request = new PutMetricDataRequest();
request.setNamespace(namespace);
List<MetricDatum> metricData = new ArrayList<MetricDatum>();
for (int i = startIndex; i < endIndex; i++) {
metricData.add(dataToPublish.get(i).datum);
}
request.setMetricData(metricData);
try {
cloudWatchClient.putMetricData(request);
LOG.info(String.format("Successfully published %d datums.", endIndex - startIndex));
} catch (AmazonClientException e) {
LOG.warn(String.format("Could not publish %d datums to CloudWatch", endIndex - startIndex), e);
}
}
}
}