| /* |
| * 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; |
| |
| import java.util.List; |
| |
| import sun.jvmstat.monitor.*; |
| import sun.jvmstat.monitor.event.VmListener; |
| |
| /** |
| * Base class for all MonitoredVm implementations that utilize the |
| * HotSpot PerfData instrumentation buffer as the communications |
| * mechanism to the target Java Virtual Machine. |
| * |
| * @author Brian Doherty |
| * @since 1.5 |
| */ |
| public abstract class AbstractMonitoredVm implements BufferedMonitoredVm { |
| |
| /** |
| * The VmIdentifier for the target. |
| */ |
| protected VmIdentifier vmid; |
| |
| /** |
| * The shared memory instrumentation buffer for the target. |
| */ |
| protected AbstractPerfDataBuffer pdb; |
| |
| /** |
| * The sampling interval, if the instrumentation buffer is acquired |
| * by sampling instead of shared memory mechanisms. |
| */ |
| protected int interval; |
| |
| /** |
| * Create an AbstractMonitoredVm instance. |
| * |
| * @param vmid the VmIdentifier for the target |
| * @param interval the initial sampling interval |
| */ |
| public AbstractMonitoredVm(VmIdentifier vmid, int interval) |
| throws MonitorException { |
| this.vmid = vmid; |
| this.interval = interval; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public VmIdentifier getVmIdentifier() { |
| return vmid; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public Monitor findByName(String name) throws MonitorException { |
| return pdb.findByName(name); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public List<Monitor> findByPattern(String patternString) throws MonitorException { |
| return pdb.findByPattern(patternString); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void detach() { |
| /* |
| * no default action required because the detach operation for the |
| * native byte buffer is managed by the Perf class. |
| */ |
| } |
| |
| |
| /* ---- Methods to support polled MonitoredVm Implementations ----- */ |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void setInterval(int interval) { |
| this.interval = interval; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int getInterval() { |
| return interval; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void setLastException(Exception e) { |
| // XXX: implement |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public Exception getLastException() { |
| // XXX: implement |
| return null; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void clearLastException() { |
| // XXX: implement |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public boolean isErrored() { |
| // XXX: implement |
| return false; |
| } |
| |
| /** |
| * Get a list of the inserted and removed monitors since last called. |
| * |
| * @return MonitorStatus - the status of available Monitors for the |
| * target Java Virtual Machine. |
| * @throws MonitorException Thrown if communications errors occur |
| * while communicating with the target. |
| */ |
| public MonitorStatus getMonitorStatus() throws MonitorException { |
| return pdb.getMonitorStatus(); |
| } |
| |
| |
| /* --------------- Methods to support VmListeners ----------------- */ |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public abstract void addVmListener(VmListener l); |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public abstract void removeVmListener(VmListener l); |
| |
| |
| /* ---- Methods to support BufferedMonitoredVm Implementations ---- */ |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public byte[] getBytes() { |
| return pdb.getBytes(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int getCapacity() { |
| return pdb.getCapacity(); |
| } |
| } |