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/*
* Copyright 2010-2014 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (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/apache2.0
*
* 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.util;
import java.util.Collections;
import java.util.List;
import org.apache.http.annotation.NotThreadSafe;
import com.amazonaws.metrics.MetricType;
import com.amazonaws.metrics.RequestMetricType;
/**
* Used as both a base class and a minimal support of AWS SDK request metrics.
* The base class of supporting AWS SDK request metrics.
*
* In contrast to {@link AWSRequestMetricsFullSupport}, which is intended to be
* a full support of AWS SDK request metrics, this class only provides access to
* a {@link TimingInfo} instance that only has minimal support for start and end
* time (ie with no-ops for sub-event measurements) for backward compatibility
* reason. The other methods related to properties and counters in this class
* are effectively no-ops.
*
* This class is instantiated instead of {@link AWSRequestMetricsFullSupport}
* when request metric collection is not required during a particular service
* request/response cycle.
*/
@NotThreadSafe
public class AWSRequestMetrics {
/**
* Predefined AWS SDK metric types general across all AWS clients. Client
* specific predefined metrics like S3 or DynamoDB are defined in the client
* specific packages.
*/
public static enum Field implements RequestMetricType {
AWSErrorCode,
AWSRequestID,
BytesProcessed,
/**
* Total number of milliseconds taken for a request/response including
* the time taken to execute the request handlers, round trip to AWS,
* and the time taken to execute the response handlers.
*/
ClientExecuteTime,
CredentialsRequestTime,
Exception,
/**
* Number of milliseconds taken for a request/response round trip to AWS.
*/
HttpRequestTime,
RedirectLocation,
RequestMarshallTime,
/**
* Number of milliseconds taken to sign a request.
*/
RequestSigningTime,
/**
* Number of milliseconds taken to execute the response handler for a response from AWS.
*/
ResponseProcessingTime,
/**
* Number of requests to AWS.
*/
RequestCount,
/**
* Number of retries of AWS SDK sending a request to AWS.
*/
RetryCount, // captured via the RequestCount since (RetryCount = RequestCount - 1)
/**
* Number of retries of the underlying http client library in sending a
* request to AWS.
*/
HttpClientRetryCount,
/**
* Time taken to send a request to AWS by the http client library,
* excluding any retry.
*/
HttpClientSendRequestTime,
/**
* Time taken to receive a response from AWS by the http client library,
* excluding any retry.
*/
HttpClientReceiveResponseTime,
/**
* The number of idle persistent connections.
*
* Reference: https://hc.apache
* .org/httpcomponents-core-ga/httpcore/apidocs/org/apache
* /http/pool/PoolStats.html
*/
HttpClientPoolAvailableCount,
/**
* The number of persistent connections tracked by the connection
* manager currently being used to execute requests.
*
* Reference: https://hc
* .apache.org/httpcomponents-core-ga/httpcore/apidocs/org/apache
* /http/pool/PoolStats.html
*/
HttpClientPoolLeasedCount,
/**
* The number of connection requests being blocked awaiting a free
* connection.
*
* Reference: https://hc.apache.org/httpcomponents-core-ga/httpcore
* /apidocs/org/apache/http/pool/PoolStats.html
*/
HttpClientPoolPendingCount,
RetryPauseTime,
// S3DownloadThroughput, // migrated to S3RequestMetric in the S3 clint library
// S3UploadThroughput, // migrated to S3RequestMetric in the S3 clint library
ServiceEndpoint,
ServiceName,
StatusCode, // The http status code
;
}
protected final TimingInfo timingInfo;
/**
* This constructor should be used only in the case when AWS SDK metrics
* collector is disabled, when minimal timing info is supported for backward
* compatibility reasons.
*
* @see AWSRequestMetricsFullSupport
*/
public AWSRequestMetrics() {
this.timingInfo = TimingInfo.startTiming();
}
protected AWSRequestMetrics(TimingInfo timingInfo) {
this.timingInfo = timingInfo;
}
public final TimingInfo getTimingInfo() {
return timingInfo;
}
/**
* Returns true if this metrics is enabled; false otherwise.
* Returns false by default.
* */
public boolean isEnabled() {
return false;
}
public void startEvent(String eventName) {}
public void startEvent(MetricType f) {}
public void endEvent(String eventName) {}
public void endEvent(MetricType f) {}
public void incrementCounter(String event) {}
public void incrementCounter(MetricType f) {}
public void setCounter(String counterName, long count) {}
public void setCounter(MetricType f, long count) {}
public void addProperty(String propertyName, Object value) {}
public void addProperty(MetricType f, Object value) {}
public void log() {}
public List