package org.apache.lucene.benchmark.byTask.tasks;
/**
* 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.
*/
import org.apache.lucene.benchmark.byTask.PerfRunData;
import org.apache.lucene.benchmark.byTask.stats.Points;
import org.apache.lucene.benchmark.byTask.stats.TaskStats;
import org.apache.lucene.benchmark.byTask.utils.Format;
/**
* A (abstract) task to be tested for performance.
* <br>
* Every performance task extends this class, and provides its own doLogic() method,
* which performss the actual task.
* <br>
* Tasks performing some work that should be measured for the task, can overide setup() and/or tearDown() and
* placed that work there.
* <br>
* Relevant properties: <code>task.max.depth.log</code>.
*/
public abstract class PerfTask implements Cloneable {
private PerfRunData runData;
// propeties that all tasks have
private String name;
private int depth = 0;
private int maxDepthLogStart = 0;
protected String params = null;
protected static final String NEW_LINE = System.getProperty("line.separator");
/**
* Should not be used externally
*/
private PerfTask() {
name = Format.simpleName(getClass());
if (name.endsWith("Task")) {
name = name.substring(0,name.length()-4);
}
}
public PerfTask(PerfRunData runData) {
this();
this.runData = runData;
this.maxDepthLogStart = runData.getConfig().get("task.max.depth.log",0);
}
/* (non-Javadoc)
* @see java.lang.Object#clone()
*/
protected Object clone() throws CloneNotSupportedException {
// tasks having non primitive data structures should overide this.
// otherwise parallel running of a task sequence might not run crrectly.
return super.clone();
}
/**
* Run the task, record statistics.
* @return number of work items done by this task.
*/
public final int runAndMaybeStats(boolean reportStats) throws Exception {
if (reportStats && depth <= maxDepthLogStart && !shouldNeverLogAtStart()) {
System.out.println("------------> starting task: " + getName());
}
if (shouldNotRecordStats() || !reportStats) {
setup();
int count = doLogic();
tearDown();
return count;
}
setup();
Points pnts = runData.getPoints();
TaskStats ts = pnts.markTaskStart(this,runData.getConfig().getRoundNumber());
int count = doLogic();
pnts.markTaskEnd(ts, count);
tearDown();
return count;
}
/**
* Perform the task once (ignoring repetions specification)
* Return number of work items done by this task.
* For indexing that can be number of docs added.
* For warming that can be number of scanned items, etc.
* @return number of work items done by this task.
*/
public abstract int doLogic() throws Exception;
/**
* @return Returns the name.
*/
public String getName() {
if (params==null) {
return name;
}
return new StringBuffer(name).append('(').append(params).append(')').toString();
}
/**
* @param name The name to set.
*/
protected void setName(String name) {
this.name = name;
}
/**
* @return Returns the run data.
*/
public PerfRunData getRunData() {
return runData;
}
/**
* @return Returns the depth.
*/
public int getDepth() {
return depth;
}
/**
* @param depth The depth to set.
*/
public void setDepth(int depth) {
this.depth = depth;
}
// compute a blank string padding for printing this task indented by its depth
String getPadding () {
char c[] = new char[4*getDepth()];
for (int i = 0; i < c.length; i++) c[i] = ' ';
return new String(c);
}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
public String toString() {
String padd = getPadding();
StringBuffer sb = new StringBuffer(padd);
sb.append(getName());
return sb.toString();
}
/**
* @return Returns the maxDepthLogStart.
*/
int getMaxDepthLogStart() {
return maxDepthLogStart;
}
/**
* Tasks that should never log at start can overide this.
* @return true if this task should never log when it start.
*/
protected boolean shouldNeverLogAtStart () {
return false;
}
/**
* Tasks that should not record statistics can overide this.
* @return true if this task should never record its statistics.
*/
protected boolean shouldNotRecordStats () {
return false;
}
/**
* Task setup work that should not be measured for that specific task.
* By default it does nothing, but tasks can implement this, moving work from
* doLogic() to this method. Only the work done in doLogicis measured for this task.
* Notice that higher level (sequence) tasks containing this task would then
* measure larger time than the sum of their contained tasks.
* @throws Exception
*/
public void setup () throws Exception {
}
/**
* Task tearDown work that should not be measured for that specific task.
* By default it does nothing, but tasks can implement this, moving work from
* doLogic() to this method. Only the work done in doLogicis measured for this task.
* Notice that higher level (sequence) tasks containing this task would then
* measure larger time than the sum of their contained tasks.
*/
public void tearDown () throws Exception {
}
/**
* Sub classes that supports parameters must overide this method to return true.
* @return true iff this task supports command line params.
*/
public boolean supportsParams () {
return false;
}
/**
* Set the params of this task.
* @exception UnsupportedOperationException for tasks supporting command line parameters.
*/
public void setParams(String params) {
if (!supportsParams()) {
throw new UnsupportedOperationException(getName()+" does not support command line parameters.");
}
this.params = params;
}
/**
* @return Returns the Params.
*/
public String getParams() {
return params;
}
}
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