author | jbachorik |
Fri, 03 Apr 2015 15:39:38 +0200 | |
changeset 30803 | 17e70318af8b |
parent 25859 | 3317bb8137f4 |
child 34953 | 67245e3259bf |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2004, 2015, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.management; |
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import java.io.IOException; |
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import java.nio.ByteBuffer; |
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import java.nio.ByteOrder; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.concurrent.atomic.AtomicInteger; |
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import sun.misc.Perf; |
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import sun.management.counter.Units; |
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import sun.management.counter.Counter; |
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import sun.management.counter.perf.PerfInstrumentation; |
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/** |
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* A utility class to support the exporting and importing of the address |
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* of a connector server using the instrumentation buffer. |
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* |
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* @since 1.5 |
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*/ |
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public class ConnectorAddressLink { |
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/** |
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* A simple wrapper for the perf-counter backing {@linkplain ByteBuffer} |
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*/ |
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private static final class PerfHandle { |
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private ByteBuffer bb; |
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private PerfHandle(ByteBuffer bb) { |
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this.bb = bb.order(ByteOrder.nativeOrder()); |
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} |
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private void putLong(long l) { |
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this.bb = bb.clear(); |
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this.bb.asLongBuffer().put(l); |
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} |
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} |
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private static final String CONNECTOR_ADDRESS_COUNTER = |
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"sun.management.JMXConnectorServer.address"; |
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private static final String REMOTE_CONNECTOR_STATE_COUNTER = |
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"sun.management.JMXConnectorServer.remote.enabled"; |
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/* |
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* The format of the jvmstat counters representing the properties of |
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* a given out-of-the-box JMX remote connector will be as follows: |
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* |
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* sun.management.JMXConnectorServer.<counter>.<key>=<value> |
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* |
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* where: |
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* |
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* counter = index computed by this class which uniquely identifies |
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* an out-of-the-box JMX remote connector running in this |
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* Java virtual machine. |
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* key/value = a given key/value pair in the map supplied to the |
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* exportRemote() method. |
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* |
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* For example, |
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* |
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* sun.management.JMXConnectorServer.0.remoteAddress=service:jmx:rmi:///jndi/rmi://myhost:5000/jmxrmi |
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* sun.management.JMXConnectorServer.0.authenticate=false |
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* sun.management.JMXConnectorServer.0.ssl=false |
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* sun.management.JMXConnectorServer.0.sslRegistry=false |
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* sun.management.JMXConnectorServer.0.sslNeedClientAuth=false |
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*/ |
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private static final String REMOTE_CONNECTOR_COUNTER_PREFIX = |
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"sun.management.JMXConnectorServer."; |
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/* |
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* JMX remote connector counter (it will be incremented every |
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* time a new out-of-the-box JMX remote connector is created). |
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*/ |
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private static final AtomicInteger counter = new AtomicInteger(); |
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private static PerfHandle remotePerfHandle = null; |
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/** |
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* Exports the specified connector address to the instrumentation buffer |
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* so that it can be read by this or other Java virtual machines running |
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* on the same system. |
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* |
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* @param address The connector address. |
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*/ |
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public static void export(String address) { |
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if (address == null || address.length() == 0) { |
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throw new IllegalArgumentException("address not specified"); |
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} |
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Perf perf = Perf.getPerf(); |
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perf.createString( |
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CONNECTOR_ADDRESS_COUNTER, 1, Units.STRING.intValue(), address); |
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} |
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public static void unexportRemote() { |
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unexport(remotePerfHandle); |
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} |
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private static void unexport(PerfHandle ph) { |
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if (ph != null) { |
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ph.putLong(-1L); |
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} |
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} |
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/** |
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* Imports the connector address from the instrument buffer |
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* of the specified Java virtual machine. |
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* |
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* @param vmid an identifier that uniquely identifies a local Java virtual |
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* machine, or <code>0</code> to indicate the current Java virtual machine. |
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* |
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* @return the value of the connector address, or <code>null</code> if the |
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* target VM has not exported a connector address. |
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* |
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* @throws IOException An I/O error occurred while trying to acquire the |
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* instrumentation buffer. |
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*/ |
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public static String importFrom(int vmid) throws IOException { |
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Perf perf = Perf.getPerf(); |
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ByteBuffer bb; |
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try { |
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bb = perf.attach(vmid, "r"); |
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} catch (IllegalArgumentException iae) { |
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throw new IOException(iae.getMessage()); |
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} |
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List<Counter> counters = |
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new PerfInstrumentation(bb).findByPattern(CONNECTOR_ADDRESS_COUNTER); |
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Iterator<Counter> i = counters.iterator(); |
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if (i.hasNext()) { |
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Counter c = i.next(); |
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return (String) c.getValue(); |
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} else { |
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return null; |
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} |
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} |
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/** |
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* Exports the specified remote connector address and associated |
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* configuration properties to the instrumentation buffer so that |
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* it can be read by this or other Java virtual machines running |
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* on the same system. |
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* |
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* @param properties The remote connector address properties. |
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*/ |
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public static void exportRemote(Map<String, String> properties) { |
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final int index = counter.getAndIncrement(); |
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Perf perf = Perf.getPerf(); |
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for (Map.Entry<String, String> entry : properties.entrySet()) { |
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perf.createString(REMOTE_CONNECTOR_COUNTER_PREFIX + index + "." + |
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entry.getKey(), 1, Units.STRING.intValue(), entry.getValue()); |
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} |
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if (remotePerfHandle != null) { |
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remotePerfHandle.putLong(index); |
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} else { |
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remotePerfHandle = new PerfHandle( |
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perf.createLong(REMOTE_CONNECTOR_STATE_COUNTER, 1, Units.NONE.intValue(), (long)index) |
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); |
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} |
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} |
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|
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/** |
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* Imports the remote connector address and associated |
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* configuration properties from the instrument buffer |
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* of the specified Java virtual machine. |
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* |
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* @param vmid an identifier that uniquely identifies a local Java virtual |
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* machine, or <code>0</code> to indicate the current Java virtual machine. |
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* |
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* @return a map containing the remote connector's properties, or an empty |
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* map if the target VM has not exported the remote connector's properties. |
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* |
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* @throws IOException An I/O error occurred while trying to acquire the |
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* instrumentation buffer. |
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*/ |
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public static Map<String, String> importRemoteFrom(int vmid) throws IOException { |
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Perf perf = Perf.getPerf(); |
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ByteBuffer bb; |
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try { |
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bb = perf.attach(vmid, "r"); |
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} catch (IllegalArgumentException iae) { |
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throw new IOException(iae.getMessage()); |
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} |
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List<Counter> counters = new PerfInstrumentation(bb).getAllCounters(); |
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Map<String, String> properties = new HashMap<>(); |
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for (Counter c : counters) { |
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String name = c.getName(); |
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if (name.startsWith(REMOTE_CONNECTOR_COUNTER_PREFIX) && |
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!name.equals(CONNECTOR_ADDRESS_COUNTER)) { |
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properties.put(name, c.getValue().toString()); |
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} |
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} |
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return properties; |
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} |
2 | 218 |
} |