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package org.apache.lucene.benchmark.byTask.tasks;
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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import org.apache.lucene.benchmark.byTask.PerfRunData;
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import org.apache.lucene.benchmark.byTask.stats.Points;
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import org.apache.lucene.benchmark.byTask.stats.TaskStats;
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import org.apache.lucene.benchmark.byTask.utils.Config;
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* An abstract task to be tested for performance. <br>
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* Every performance task extends this class, and provides its own
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* {@link #doLogic()} method, which performs the actual task. <br>
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* Tasks performing some work that should be measured for the task, can override
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* {@link #setup()} and/or {@link #tearDown()} and place that work there. <br>
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* Relevant properties: <code>task.max.depth.log</code>.<br>
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* Also supports the following logging attributes:
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* <li>log.step - specifies how often to log messages about the current running
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* task. Default is 1000 {@link #doLogic()} invocations. Set to -1 to disable
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* <li>log.step.[class Task Name] - specifies the same as 'log.step', only for a
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* particular task name. For example, log.step.AddDoc will be applied only for
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* {@link AddDocTask}, but not for {@link DeleteDocTask}. It's a way to control
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* per task logging settings. If you want to omit logging for any other task,
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* include log.step=-1. The syntax is "log.step." together with the Task's
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* 'short' name (i.e., without the 'Task' part).
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public abstract class PerfTask implements Cloneable {
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static final int DEFAULT_LOG_STEP = 1000;
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private PerfRunData runData;
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// propeties that all tasks have
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private int depth = 0;
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protected int logStep;
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private int logStepCount = 0;
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private int maxDepthLogStart = 0;
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private boolean disableCounting = false;
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protected String params = null;
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private boolean runInBackground;
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protected static final String NEW_LINE = System.getProperty("line.separator");
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/** Should not be used externally */
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name = getClass().getSimpleName();
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if (name.endsWith("Task")) {
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name = name.substring(0, name.length() - 4);
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public void setRunInBackground(int deltaPri) {
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runInBackground = true;
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this.deltaPri = deltaPri;
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public boolean getRunInBackground() {
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return runInBackground;
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public int getBackgroundDeltaPriority() {
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protected volatile boolean stopNow;
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public void stopNow() {
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public PerfTask(PerfRunData runData) {
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this.runData = runData;
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Config config = runData.getConfig();
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this.maxDepthLogStart = config.get("task.max.depth.log",0);
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String logStepAtt = "log.step";
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String taskLogStepAtt = "log.step." + name;
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if (config.get(taskLogStepAtt, null) != null) {
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logStepAtt = taskLogStepAtt;
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// It's important to read this from Config, to support vals-by-round.
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logStep = config.get(logStepAtt, DEFAULT_LOG_STEP);
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// To avoid the check 'if (logStep > 0)' in tearDown(). This effectively
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// turns logging off.
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logStep = Integer.MAX_VALUE;
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protected Object clone() throws CloneNotSupportedException {
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// tasks having non primitive data structures should override this.
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// otherwise parallel running of a task sequence might not run correctly.
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return super.clone();
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public void close() throws Exception {
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* Run the task, record statistics.
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* @return number of work items done by this task.
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public final int runAndMaybeStats(boolean reportStats) throws Exception {
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if (!reportStats || shouldNotRecordStats()) {
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int count = doLogic();
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count = disableCounting ? 0 : count;
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if (reportStats && depth <= maxDepthLogStart && !shouldNeverLogAtStart()) {
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System.out.println("------------> starting task: " + getName());
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Points pnts = runData.getPoints();
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TaskStats ts = pnts.markTaskStart(this, runData.getConfig().getRoundNumber());
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int count = doLogic();
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count = disableCounting ? 0 : count;
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pnts.markTaskEnd(ts, count);
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* Perform the task once (ignoring repetitions specification)
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* Return number of work items done by this task.
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* For indexing that can be number of docs added.
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* For warming that can be number of scanned items, etc.
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* @return number of work items done by this task.
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public abstract int doLogic() throws Exception;
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* @return Returns the name.
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public String getName() {
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return new StringBuilder(name).append('(').append(params).append(')').toString();
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* @param name The name to set.
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protected void setName(String name) {
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* @return Returns the run data.
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public PerfRunData getRunData() {
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* @return Returns the depth.
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public int getDepth() {
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* @param depth The depth to set.
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public void setDepth(int depth) {
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// compute a blank string padding for printing this task indented by its depth
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String getPadding () {
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char c[] = new char[4*getDepth()];
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for (int i = 0; i < c.length; i++) c[i] = ' ';
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return new String(c);
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* @see java.lang.Object#toString()
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public String toString() {
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String padd = getPadding();
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StringBuilder sb = new StringBuilder(padd);
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if (disableCounting) {
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sb.append(getName());
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if (getRunInBackground()) {
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int x = getBackgroundDeltaPriority();
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return sb.toString();
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* @return Returns the maxDepthLogStart.
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int getMaxDepthLogStart() {
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return maxDepthLogStart;
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protected String getLogMessage(int recsCount) {
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return "processed " + recsCount + " records";
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* Tasks that should never log at start can override this.
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* @return true if this task should never log when it start.
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protected boolean shouldNeverLogAtStart () {
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* Tasks that should not record statistics can override this.
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* @return true if this task should never record its statistics.
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protected boolean shouldNotRecordStats () {
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* Task setup work that should not be measured for that specific task.
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* By default it does nothing, but tasks can implement this, moving work from
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* doLogic() to this method. Only the work done in doLogicis measured for this task.
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* Notice that higher level (sequence) tasks containing this task would then
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* measure larger time than the sum of their contained tasks.
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public void setup () throws Exception {
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* Task tearDown work that should not be measured for that specific task.
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* By default it does nothing, but tasks can implement this, moving work from
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* doLogic() to this method. Only the work done in doLogicis measured for this task.
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* Notice that higher level (sequence) tasks containing this task would then
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* measure larger time than the sum of their contained tasks.
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public void tearDown() throws Exception {
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if (++logStepCount % logStep == 0) {
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double time = (System.currentTimeMillis() - runData.getStartTimeMillis()) / 1000.0;
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System.out.println(String.format("%7.2f",time) + " sec --> "
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+ Thread.currentThread().getName() + " " + getLogMessage(logStepCount));
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* Sub classes that supports parameters must override this method to return true.
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* @return true iff this task supports command line params.
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public boolean supportsParams () {
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* Set the params of this task.
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* @exception UnsupportedOperationException for tasks supporting command line parameters.
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public void setParams(String params) {
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if (!supportsParams()) {
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throw new UnsupportedOperationException(getName()+" does not support command line parameters.");
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this.params = params;
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* @return Returns the Params.
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public String getParams() {
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* Return true if counting is disabled for this task.
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public boolean isDisableCounting() {
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return disableCounting;
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* See {@link #isDisableCounting()}
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public void setDisableCounting(boolean disableCounting) {
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this.disableCounting = disableCounting;