ProfiledExecutionContext.java

/*
 * Copyright (c) 2001-2017, Zoltan Farkas All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Additionally licensed with:
 *
 * Licensed 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.spf4j.stackmonitor;

import javax.annotation.Nullable;
import org.spf4j.base.BasicExecutionContext;
import org.spf4j.base.ExecutionContext;
import org.spf4j.base.StackSamples;

/**
 *
 * @author Zoltan Farkas
 */
public final class ProfiledExecutionContext extends BasicExecutionContext {

  private SampleNode sampleNode;

  private final Object sync;

  public ProfiledExecutionContext(final String name, final CharSequence id, final ExecutionContext parent,
          final Relation relation, final  long startTimeNanos, final long deadlineNanos) {
    super(name, id, parent, relation, startTimeNanos, deadlineNanos);
    sync = new Object();
    sampleNode = null;
  }

  @Override
  @Nullable
  public SampleNode getAndClearStackSamples() {
    synchronized (sync) {
      SampleNode result = sampleNode;
      sampleNode = null;
      return result;
    }
  }

  @Override
  @Nullable
  public StackSamples getStackSamples() {
    synchronized (sync) {
      if (sampleNode == null) {
        return null;
      }
      return SampleNode.clone(sampleNode);
    }
  }

  @Override
  public void add(final StackTraceElement[] sample) {
    synchronized (sync) {
      if (sampleNode == null) {
        sampleNode = SampleNode.createSampleNode(sample);
      } else {
        SampleNode.addToSampleNode(sampleNode, sample);
      }
    }
  }

  @Override
  public void add(final StackSamples samples) {
    synchronized (sync) {
      if (sampleNode == null) {
        sampleNode = SampleNode.create(samples);
      } else {
        sampleNode.add(samples);
      }
    }
  }

  @Override
  public synchronized void close() {
    if (!isClosed()) {
      super.close();
      synchronized (sync) {
        if (sampleNode != null) {
          ExecutionContext notClosedParent = getNotClosedParent();
          if (notClosedParent != null) {
            notClosedParent.add(sampleNode);
          }
        }
      }
    }
  }

}