| /* |
| * Copyright (c) 2009, 2011, 2012, 2015 Eike Stepper (Berlin, Germany) and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Eike Stepper - initial API and implementation |
| */ |
| package org.eclipse.net4j.util.om.monitor; |
| |
| import org.eclipse.net4j.internal.util.bundle.OM; |
| import org.eclipse.net4j.util.CheckUtil; |
| import org.eclipse.net4j.util.WrappedException; |
| import org.eclipse.net4j.util.om.trace.ContextTracer; |
| |
| import java.util.Arrays; |
| |
| /** |
| * @author Eike Stepper |
| * @since 2.0 |
| */ |
| public abstract class ProgressDistributor |
| { |
| private static final ContextTracer TRACER = new ContextTracer(OM.DEBUG_MONITOR, ProgressDistributor.class); |
| |
| private double[] distribution; |
| |
| public ProgressDistributor() |
| { |
| } |
| |
| public final <CONTEXT> void run(ProgressDistributable<CONTEXT>[] distributables, CONTEXT context, OMMonitor monitor) |
| throws RuntimeException, WrappedException |
| { |
| double[] distributionCopy; |
| synchronized (this) |
| { |
| if (distribution == null) |
| { |
| distribution = new double[distributables.length]; |
| Arrays.fill(distribution, OMMonitor.ONE); |
| } |
| else |
| { |
| CheckUtil.checkArg(distribution.length == distributables.length, "distributables.length"); //$NON-NLS-1$ |
| } |
| |
| distributionCopy = new double[distribution.length]; |
| System.arraycopy(distribution, 0, distributionCopy, 0, distribution.length); |
| } |
| |
| double total = OMMonitor.ZERO; |
| for (int i = 0; i < distributionCopy.length; i++) |
| { |
| total += distributionCopy[i]; |
| } |
| |
| if (TRACER.isEnabled()) |
| { |
| StringBuilder builder = new StringBuilder("Distribution: "); //$NON-NLS-1$ |
| for (int i = 0; i < distributionCopy.length; i++) |
| { |
| builder.append(distributionCopy[i] * OMMonitor.HUNDRED / total); |
| builder.append("%, "); //$NON-NLS-1$ |
| } |
| |
| builder.append("("); //$NON-NLS-1$ |
| builder.append(this); |
| builder.append(")"); //$NON-NLS-1$ |
| TRACER.trace(builder.toString()); |
| } |
| |
| monitor.begin(total); |
| |
| try |
| { |
| double[] times = new double[distributables.length]; |
| for (int i = 0; i < distributables.length; i++) |
| { |
| ProgressDistributable<CONTEXT> distributable = distributables[i]; |
| int count = distributable.getLoopCount(context); |
| double work = distributable.getLoopWork(context); |
| |
| OMMonitor distributableMonitor = monitor.fork(distributionCopy[i]); |
| distributableMonitor.begin(work * count); |
| |
| try |
| { |
| long start = System.currentTimeMillis(); |
| for (int loop = 0; loop < count; loop++) |
| { |
| try |
| { |
| distributable.runLoop(loop, context, distributableMonitor); |
| } |
| catch (Exception ex) |
| { |
| throw WrappedException.wrap(ex); |
| } |
| } |
| |
| times[i] = (double)(System.currentTimeMillis() - start) / count; |
| } |
| finally |
| { |
| distributableMonitor.done(); |
| } |
| } |
| |
| synchronized (this) |
| { |
| distribute(distribution, times); |
| } |
| } |
| finally |
| { |
| monitor.done(); |
| } |
| } |
| |
| protected abstract void distribute(double[] distribution, double[] times); |
| |
| public static <CONTEXT> ProgressDistributable<CONTEXT>[] array(ProgressDistributable<CONTEXT>... ops) |
| { |
| return ops; |
| } |
| |
| /** |
| * @author Eike Stepper |
| */ |
| public static class Arithmetic extends ProgressDistributor |
| { |
| private long count; |
| |
| private double[] times; |
| |
| public Arithmetic() |
| { |
| } |
| |
| @Override |
| protected void distribute(double[] distribution, double[] times) |
| { |
| ++count; |
| for (int i = 0; i < times.length; i++) |
| { |
| this.times[i] += times[i]; |
| distribution[i] = this.times[i] / count; |
| } |
| } |
| } |
| |
| /** |
| * @author Eike Stepper |
| */ |
| public static class Geometric extends ProgressDistributor |
| { |
| public Geometric() |
| { |
| } |
| |
| @Override |
| protected void distribute(double[] distribution, double[] times) |
| { |
| for (int i = 0; i < times.length; i++) |
| { |
| distribution[i] = (distribution[i] + times[i]) / 2; |
| } |
| } |
| } |
| } |