/* * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package sun.jvmstat.perfdata.monitor.protocol.rmi;import sun.jvmstat.monitor.*;import sun.jvmstat.monitor.remote.*;import sun.jvmstat.perfdata.monitor.*;import java.io.*;import java.rmi.RemoteException;import java.nio.ByteBuffer;/** * The concrete PerfDataBuffer implementation for the <em>rmi:</em> * protocol for the HotSpot PerfData monitoring implementation. * <p> * This class is responsible for acquiring the instrumentation buffer * data for a remote target HotSpot Java Virtual Machine. * * @author Brian Doherty * @since 1.5 */public class PerfDataBuffer extends AbstractPerfDataBuffer { private RemoteVm rvm; /** * Create a PerfDataBuffer instance for accessing the specified * instrumentation buffer. * * @param rvm the proxy to the remote MonitredVm object * @param lvmid the local Java Virtual Machine Identifier of the * remote target. * * @throws MonitorException */ public PerfDataBuffer(RemoteVm rvm, int lvmid) throws MonitorException { this.rvm = rvm; try { ByteBuffer buffer = ByteBuffer.allocate(rvm.getCapacity()); sample(buffer); createPerfDataBuffer(buffer, lvmid); } catch (RemoteException e) { throw new MonitorException("Could not read data for remote JVM " + lvmid, e); } } /** * Get a copy of the remote instrumentation buffer. *<p> * The data in the remote instrumentation buffer is copied into * the local byte buffer. * * @param buffer the buffer to receive the copy of the remote * instrumentation buffer. * @throws RemoteException Thrown on any communications errors with * the remote system. */ public void sample(ByteBuffer buffer) throws RemoteException { assert buffer != null; assert rvm != null; synchronized(buffer) { buffer.clear(); buffer.put(rvm.getBytes()); } }}
/*
* Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.jvmstat.perfdata.monitor.protocol.rmi;
import sun.jvmstat.monitor.*;
import sun.jvmstat.monitor.remote.*;
import sun.jvmstat.perfdata.monitor.*;
import java.io.*;
import java.rmi.RemoteException;
import java.nio.ByteBuffer;
/**
* The concrete PerfDataBuffer implementation for the <em>rmi:</em>
* protocol for the HotSpot PerfData monitoring implementation.
* <p>
* This class is responsible for acquiring the instrumentation buffer
* data for a remote target HotSpot Java Virtual Machine.
*
* @author Brian Doherty
* @since 1.5
*/
public class PerfDataBuffer extends AbstractPerfDataBuffer {
private RemoteVm rvm;
/**
* Create a PerfDataBuffer instance for accessing the specified
* instrumentation buffer.
*
* @param rvm the proxy to the remote MonitredVm object
* @param lvmid the local Java Virtual Machine Identifier of the
* remote target.
*
* @throws MonitorException
*/
public PerfDataBuffer(RemoteVm rvm, int lvmid) throws MonitorException {
this.rvm = rvm;
try {
ByteBuffer buffer = ByteBuffer.allocate(rvm.getCapacity());
sample(buffer);
createPerfDataBuffer(buffer, lvmid);
} catch (RemoteException e) {
throw new MonitorException("Could not read data for remote JVM "
+ lvmid, e);
}
}
/**
* Get a copy of the remote instrumentation buffer.
*<p>
* The data in the remote instrumentation buffer is copied into
* the local byte buffer.
*
* @param buffer the buffer to receive the copy of the remote
* instrumentation buffer.
* @throws RemoteException Thrown on any communications errors with
* the remote system.
*/
public void sample(ByteBuffer buffer) throws RemoteException {
assert buffer != null;
assert rvm != null;
synchronized(buffer) {
buffer.clear();
buffer.put(rvm.getBytes());
}
}
}