Java tutorial
/* * Copyright (c) 2005-2014, WSO2 Inc. (http://www.wso2.org) All Rights Reserved. * * WSO2 Inc. 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.synapse.transport.passthru.jmx; import org.apache.http.protocol.HttpContext; import org.apache.synapse.transport.nhttp.NhttpConstants; import org.apache.synapse.transport.passthru.PassThroughConstants; /** * Class responsible for collect Latency values per request */ public class LatencyCollector { /** * Time between response header retrieve time and request written completion time */ private long backendLatency = 0; /** * complete latency */ private long latency = 0; /** * Time between req from client read end time and req from client read start time. */ private long serverDecodeLatency = 0; /** * Time between req to BE write end time and req to BE write start time. */ private long clientEncodeLatency = 0; /** * Time between res read end time from BE and res read start time form BE */ private long clientDecodeLatency = 0; /** * Time between res write end from BE and res write start time */ private long serverEncodeLatency = 0; /** * Time between SeverWorker initiated and run */ private long serverWorkerQueuedTime = 0; /** * Time between SeverWorker initiated and run */ private long clientWorkerQueuedTime = 0; /** * Time between SeverWorker run and request to BE write start time */ private long serverWorkerLatency = 0; /** * Time between ClientWorker run and response to Client write start time. */ private long clientWorkerLatency = 0; public LatencyCollector(HttpContext context, boolean isS2S) { Object o1, o2, o3, o4; o1 = context.getAttribute(PassThroughConstants.REQ_ARRIVAL_TIME); o2 = context.getAttribute(PassThroughConstants.REQ_DEPARTURE_TIME); if (isS2S) { o3 = context.getAttribute(PassThroughConstants.RES_HEADER_ARRIVAL_TIME); o4 = context.getAttribute(PassThroughConstants.RES_TO_CLIENT_WRITE_START_TIME); } else { o3 = context.getAttribute(PassThroughConstants.RES_ARRIVAL_TIME); o4 = context.getAttribute(PassThroughConstants.RES_DEPARTURE_TIME); } if (o1 != null && o2 != null && o3 != null && o4 != null) { long tReqArrival = (Long) o1; long tReqDeparture = (Long) o2; long tResArrival = (Long) o3; long tResDeparture = (Long) o4; backendLatency = (tResArrival - tReqDeparture); latency = (tResDeparture - tReqArrival) - backendLatency; } o1 = context.getAttribute(PassThroughConstants.REQ_FROM_CLIENT_READ_START_TIME); o2 = context.getAttribute(PassThroughConstants.REQ_FROM_CLIENT_READ_END_TIME); if (o1 != null && o2 != null) { serverDecodeLatency = (Long) o2 - (Long) o1; } o1 = context.getAttribute(PassThroughConstants.REQ_TO_BACKEND_WRITE_START_TIME); o2 = context.getAttribute(PassThroughConstants.REQ_TO_BACKEND_WRITE_END_TIME); if (o1 != null && o2 != null) { clientEncodeLatency = (Long) o2 - (Long) o1; } o1 = context.getAttribute(PassThroughConstants.RES_FROM_BACKEND_READ_START_TIME); o2 = context.getAttribute(PassThroughConstants.RES_FROM_BACKEND_READ_END_TIME); if (o1 != null && o2 != null) { clientDecodeLatency = (Long) o2 - (Long) o1; } o1 = context.getAttribute(PassThroughConstants.RES_TO_CLIENT_WRITE_START_TIME); o2 = context.getAttribute(PassThroughConstants.RES_TO_CLIENT_WRITE_END_TIME); if (o1 != null && o2 != null) { serverEncodeLatency = (Long) o2 - (Long) o1; } o1 = context.getAttribute(PassThroughConstants.SERVER_WORKER_START_TIME); o2 = context.getAttribute(PassThroughConstants.SERVER_WORKER_INIT_TIME); if (o1 != null && o2 != null) { serverWorkerQueuedTime = (Long) o1 - (Long) o2; } o1 = context.getAttribute(PassThroughConstants.CLIENT_WORKER_START_TIME); o2 = context.getAttribute(PassThroughConstants.CLIENT_WORKER_INIT_TIME); if (o1 != null && o2 != null) { clientWorkerQueuedTime = (Long) o1 - (Long) o2; } o1 = context.getAttribute(PassThroughConstants.REQ_TO_BACKEND_WRITE_START_TIME); o2 = context.getAttribute(PassThroughConstants.SERVER_WORKER_START_TIME); if (o1 != null && o2 != null) { serverWorkerLatency = (Long) o1 - (Long) o2; } o1 = context.getAttribute(PassThroughConstants.RES_TO_CLIENT_WRITE_START_TIME); o2 = context.getAttribute(PassThroughConstants.CLIENT_WORKER_START_TIME); if (o1 != null && o2 != null) { clientWorkerLatency = (Long) o1 - (Long) o2; } } public long getBackendLatency() { return backendLatency; } public long getLatency() { return latency; } public long getServerDecodeLatency() { return serverDecodeLatency; } public long getServerEncodeLatency() { return serverEncodeLatency; } public long getClientEncodeLatency() { return clientEncodeLatency; } public long getClientDecodeLatency() { return clientDecodeLatency; } public long getServerWorkerQueuedTime() { return serverWorkerQueuedTime; } public long getClientWorkerQueuedTime() { return clientWorkerQueuedTime; } public long getServerWorkerLatency() { return serverWorkerLatency; } public long getClientWorkerLatency() { return clientWorkerLatency; } /** * Clear all timestamps saved. * @param context HttpContext */ public static void clearTimestamps(HttpContext context) { if (context == null) { return; } context.removeAttribute(NhttpConstants.REQ_ARRIVAL_TIME); context.removeAttribute(NhttpConstants.REQ_DEPARTURE_TIME); context.removeAttribute(NhttpConstants.RES_HEADER_ARRIVAL_TIME); context.removeAttribute(NhttpConstants.RES_TO_CLIENT_WRITE_START_TIME); context.removeAttribute(NhttpConstants.RES_ARRIVAL_TIME); context.removeAttribute(NhttpConstants.RES_DEPARTURE_TIME); context.removeAttribute(NhttpConstants.REQ_FROM_CLIENT_READ_START_TIME); context.removeAttribute(NhttpConstants.REQ_FROM_CLIENT_READ_END_TIME); context.removeAttribute(NhttpConstants.REQ_TO_BACKEND_WRITE_START_TIME); context.removeAttribute(NhttpConstants.REQ_TO_BACKEND_WRITE_END_TIME); context.removeAttribute(NhttpConstants.RES_FROM_BACKEND_READ_START_TIME); context.removeAttribute(NhttpConstants.RES_FROM_BACKEND_READ_END_TIME); context.removeAttribute(NhttpConstants.RES_TO_CLIENT_WRITE_END_TIME); context.removeAttribute(NhttpConstants.SERVER_WORKER_START_TIME); context.removeAttribute(NhttpConstants.SERVER_WORKER_INIT_TIME); context.removeAttribute(NhttpConstants.CLIENT_WORKER_START_TIME); context.removeAttribute(NhttpConstants.CLIENT_WORKER_INIT_TIME); } }