VisorThreadMonitorInfo.java

/*
 * 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.
 */

package org.apache.ignite.internal.visor.debug;

import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.lang.management.MonitorInfo;
import org.apache.ignite.internal.util.typedef.internal.S;
import org.apache.ignite.internal.visor.VisorDataTransferObjectInput;
import org.apache.ignite.internal.visor.VisorDataTransferObjectOutput;

/**
 * Data transfer object for {@link MonitorInfo}.
 */
public class VisorThreadMonitorInfo extends VisorThreadLockInfo {
    /** */
    private static final long serialVersionUID = 0L;

    /** Stack depth. */
    private int stackDepth;

    /** Stack frame. */
    private StackTraceElement stackFrame;

    /**
     * Default constructor.
     */
    public VisorThreadMonitorInfo() {
        // No-op.
    }

    /**
     * Create data transfer object for given monitor info.
     *
     * @param mi Monitoring info.
     */
    public VisorThreadMonitorInfo(MonitorInfo mi) {
        super(mi);

        stackDepth = mi.getLockedStackDepth();
        stackFrame = mi.getLockedStackFrame();
    }

    /**
     * @return Stack depth.
     */
    public int getStackDepth() {
        return stackDepth;
    }

    /**
     * @return Stack frame.
     */
    public StackTraceElement getStackFrame() {
        return stackFrame;
    }

    /** {@inheritDoc} */
    @Override public byte getProtocolVersion() {
        return 1;
    }

    /** {@inheritDoc} */
    @Override protected void writeExternalData(ObjectOutput out) throws IOException {
        try (VisorDataTransferObjectOutput dtout = new VisorDataTransferObjectOutput(out)) {
            dtout.writeByte(super.getProtocolVersion());
            super.writeExternalData(dtout);
        }

        out.writeInt(stackDepth);
        out.writeObject(stackFrame);
    }

    /** {@inheritDoc} */
    @Override protected void readExternalData(byte protoVer, ObjectInput in) throws IOException, ClassNotFoundException {
        try (VisorDataTransferObjectInput dtin = new VisorDataTransferObjectInput(in)) {
            super.readExternalData(dtin.readByte(), dtin);
        }

        stackDepth = in.readInt();
        stackFrame = (StackTraceElement)in.readObject();
    }

    /** {@inheritDoc} */
    @Override public String toString() {
        return S.toString(VisorThreadMonitorInfo.class, this);
    }
}