author | mchung |
Tue, 17 Jan 2012 15:55:40 -0800 | |
changeset 11530 | a9d059c15b80 |
parent 5506 | 202f599c92aa |
child 14342 | 8435a30053c1 |
permissions | -rw-r--r-- |
2 | 1 |
/* |
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* Copyright (c) 2003, 2006, Oracle and/or its affiliates. All rights reserved. |
2 | 3 |
* 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 |
2 | 8 |
* 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.snmp.jvminstr; |
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// java imports |
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// |
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import com.sun.jmx.mbeanserver.Util; |
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import java.io.Serializable; |
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import java.util.Vector; |
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import java.util.Map; |
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import java.util.TreeMap; |
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import java.util.Enumeration; |
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import java.lang.management.ThreadInfo; |
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import java.lang.management.ManagementFactory; |
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// jmx imports |
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// |
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import javax.management.MBeanServer; |
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import javax.management.ObjectName; |
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import com.sun.jmx.snmp.SnmpCounter; |
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import com.sun.jmx.snmp.SnmpCounter64; |
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import com.sun.jmx.snmp.SnmpGauge; |
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import com.sun.jmx.snmp.SnmpInt; |
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import com.sun.jmx.snmp.SnmpUnsignedInt; |
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import com.sun.jmx.snmp.SnmpIpAddress; |
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import com.sun.jmx.snmp.SnmpTimeticks; |
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import com.sun.jmx.snmp.SnmpOpaque; |
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import com.sun.jmx.snmp.SnmpString; |
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import com.sun.jmx.snmp.SnmpStringFixed; |
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import com.sun.jmx.snmp.SnmpOid; |
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import com.sun.jmx.snmp.SnmpNull; |
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import com.sun.jmx.snmp.SnmpValue; |
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import com.sun.jmx.snmp.SnmpVarBind; |
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import com.sun.jmx.snmp.SnmpStatusException; |
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// jdmk imports |
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// |
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import com.sun.jmx.snmp.agent.SnmpIndex; |
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import com.sun.jmx.snmp.agent.SnmpMib; |
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import com.sun.jmx.snmp.agent.SnmpMibTable; |
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import com.sun.jmx.snmp.agent.SnmpMibSubRequest; |
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import com.sun.jmx.snmp.agent.SnmpStandardObjectServer; |
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import sun.management.snmp.jvmmib.JvmThreadInstanceEntryMBean; |
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import sun.management.snmp.jvmmib.JvmThreadInstanceTableMeta; |
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import sun.management.snmp.util.SnmpTableCache; |
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import sun.management.snmp.util.SnmpCachedData; |
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import sun.management.snmp.util.SnmpTableHandler; |
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import sun.management.snmp.util.MibLogger; |
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import sun.management.snmp.util.JvmContextFactory; |
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/** |
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* The class is used for implementing the "JvmThreadInstanceTable" group. |
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*/ |
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public class JvmThreadInstanceTableMetaImpl |
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extends JvmThreadInstanceTableMeta { |
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mchung
parents:
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diff
changeset
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static final long serialVersionUID = -8432271929226397492L; |
a9d059c15b80
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/** |
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* Maximum depth of the stacktrace that might be returned through |
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* SNMP. |
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* |
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* Since we do not export the stack trace through SNMP, we set |
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* MAX_STACK_TRACE_DEPTH=0 so that ThreadMXBean.getThreadInfo(long) does |
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* not compute the stack trace. |
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* |
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**/ |
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public static final int MAX_STACK_TRACE_DEPTH=0; |
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/** |
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* Translate from a long to a Oid. Arc follow the long big-endian order. |
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* @param l The long to make the index from |
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* @return The arc array. |
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*/ |
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static SnmpOid makeOid(long l) { |
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long[] x = new long [8]; |
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x[0] = (l >> 56) & 0xFF; |
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x[1] = (l >> 48) & 0x00FF; |
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x[2] = (l >> 40) & 0x0000FF; |
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x[3] = (l >> 32) & 0x000000FF; |
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x[4] = (l >> 24) & 0x00000000FF; |
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x[5] = (l >> 16) & 0x0000000000FF; |
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x[6] = (l >> 8) & 0x000000000000FF; |
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x[7] = l & 0x00000000000000FF; |
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return new SnmpOid(x); |
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} |
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/** |
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* Translate an Oid to a thread id. Arc follow the long big-endian order. |
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* @param oid The oid to make the id from |
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* @return The thread id. |
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*/ |
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static long makeId(SnmpOid oid) { |
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long id = 0; |
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long[] arcs = oid.longValue(false); |
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id |= arcs[0] << 56; |
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id |= arcs[1] << 48; |
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id |= arcs[2] << 40; |
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id |= arcs[3] << 32; |
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id |= arcs[4] << 24; |
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id |= arcs[5] << 16; |
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id |= arcs[6] << 8; |
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id |= arcs[7]; |
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return id; |
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} |
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/** |
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* A concrete implementation of {@link SnmpTableCache}, for the |
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* JvmThreadInstanceTable. |
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**/ |
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private static class JvmThreadInstanceTableCache |
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extends SnmpTableCache { |
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11530
a9d059c15b80
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mchung
parents:
5506
diff
changeset
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static final long serialVersionUID = 4947330124563406878L; |
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final private JvmThreadInstanceTableMetaImpl meta; |
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/** |
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* Create a weak cache for the JvmThreadInstanceTable. |
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* @param validity validity of the cached data, in ms. |
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**/ |
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JvmThreadInstanceTableCache(JvmThreadInstanceTableMetaImpl meta, |
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long validity) { |
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this.validity = validity; |
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this.meta = meta; |
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} |
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/** |
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* Call <code>getTableDatas(JvmContextFactory.getUserData())</code>. |
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**/ |
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public SnmpTableHandler getTableHandler() { |
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mchung
parents:
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final Map<Object, Object> userData = JvmContextFactory.getUserData(); |
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return getTableDatas(userData); |
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} |
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/** |
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* Return a table handler containing the Thread indexes. |
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* Indexes are computed from the ThreadId. |
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**/ |
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protected SnmpCachedData updateCachedDatas(Object userData) { |
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// We are getting all the thread ids. WARNING. |
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// Some of them will be not valid when accessed for data... |
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// See getEntry |
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long[] id = JvmThreadingImpl.getThreadMXBean().getAllThreadIds(); |
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// Time stamp for the cache |
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final long time = System.currentTimeMillis(); |
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SnmpOid indexes[] = new SnmpOid[id.length]; |
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final TreeMap<SnmpOid, Object> table = |
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mchung
parents:
5506
diff
changeset
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new TreeMap<>(SnmpCachedData.oidComparator); |
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for(int i = 0; i < id.length; i++) { |
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log.debug("", "Making index for thread id [" + id[i] +"]"); |
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//indexes[i] = makeOid(id[i]); |
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SnmpOid oid = makeOid(id[i]); |
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table.put(oid, oid); |
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} |
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return new SnmpCachedData(time, table); |
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} |
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} |
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// The weak cache for this table. |
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protected SnmpTableCache cache; |
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/** |
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* Constructor for the table. Initialize metadata for |
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* "JvmThreadInstanceTableMeta". |
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* The reference on the MBean server is updated so the entries created |
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* through an SNMP SET will be AUTOMATICALLY REGISTERED in Java DMK. |
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*/ |
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public JvmThreadInstanceTableMetaImpl(SnmpMib myMib, |
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SnmpStandardObjectServer objserv) { |
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super(myMib, objserv); |
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cache = new JvmThreadInstanceTableCache(this, |
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((JVM_MANAGEMENT_MIB_IMPL)myMib).validity()); |
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log.debug("JvmThreadInstanceTableMetaImpl", "Create Thread meta"); |
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} |
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// See com.sun.jmx.snmp.agent.SnmpMibTable |
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protected SnmpOid getNextOid(Object userData) |
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throws SnmpStatusException { |
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log.debug("JvmThreadInstanceTableMetaImpl", "getNextOid"); |
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// null means get the first OID. |
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return getNextOid(null,userData); |
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} |
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// See com.sun.jmx.snmp.agent.SnmpMibTable |
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protected SnmpOid getNextOid(SnmpOid oid, Object userData) |
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throws SnmpStatusException { |
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log.debug("getNextOid", "previous=" + oid); |
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// Get the data handler. |
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// |
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SnmpTableHandler handler = getHandler(userData); |
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if (handler == null) { |
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// This should never happen. |
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// If we get here it's a bug. |
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// |
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log.debug("getNextOid", "handler is null!"); |
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throw new SnmpStatusException(SnmpStatusException.noSuchInstance); |
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} |
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// Get the next oid |
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// |
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SnmpOid next = oid; |
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while(true) { |
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next = handler.getNext(next); |
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if (next == null) break; |
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if (getJvmThreadInstance(userData,next) != null) break; |
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} |
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log.debug("*** **** **** **** getNextOid", "next=" + next); |
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// if next is null: we reached the end of the table. |
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// |
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if (next == null) |
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throw new SnmpStatusException(SnmpStatusException.noSuchInstance); |
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return next; |
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} |
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// See com.sun.jmx.snmp.agent.SnmpMibTable |
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protected boolean contains(SnmpOid oid, Object userData) { |
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// Get the handler. |
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// |
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SnmpTableHandler handler = getHandler(userData); |
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// handler should never be null. |
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// |
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if (handler == null) |
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return false; |
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if(!handler.contains(oid)) |
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return false; |
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JvmThreadInstanceEntryImpl inst = getJvmThreadInstance(userData, oid); |
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return (inst != null); |
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} |
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// See com.sun.jmx.snmp.agent.SnmpMibTable |
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public Object getEntry(SnmpOid oid) |
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throws SnmpStatusException { |
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log.debug("*** **** **** **** getEntry", "oid [" + oid + "]"); |
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if (oid == null || oid.getLength() != 8) { |
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log.debug("getEntry", "Invalid oid [" + oid + "]"); |
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throw new SnmpStatusException(SnmpStatusException.noSuchInstance); |
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} |
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// Get the request contextual cache (userData). |
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// |
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mchung
parents:
5506
diff
changeset
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283 |
final Map<Object,Object> m = JvmContextFactory.getUserData(); |
2 | 284 |
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// Get the handler. |
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// |
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SnmpTableHandler handler = getHandler(m); |
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289 |
// handler should never be null. |
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// |
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if (handler == null || !handler.contains(oid)) |
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throw new SnmpStatusException(SnmpStatusException.noSuchInstance); |
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final JvmThreadInstanceEntryImpl entry = getJvmThreadInstance(m,oid); |
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296 |
if (entry == null) |
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throw new SnmpStatusException(SnmpStatusException.noSuchInstance); |
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return entry; |
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} |
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/** |
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303 |
* Get the SnmpTableHandler that holds the jvmThreadInstanceTable data. |
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* First look it up in the request contextual cache, and if it is |
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* not found, obtain it from the weak cache. |
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* <br>The request contextual cache will be released at the end of the |
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* current requests, and is used only to process this request. |
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* <br>The weak cache is shared by all requests, and is only |
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* recomputed when it is found to be obsolete. |
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* <br>Note that the data put in the request contextual cache is |
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* never considered to be obsolete, in order to preserve data |
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* coherency. |
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**/ |
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protected SnmpTableHandler getHandler(Object userData) { |
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315 |
final Map<Object, Object> m; |
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316 |
if (userData instanceof Map) m=Util.cast(userData); |
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else m=null; |
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318 |
||
319 |
// Look in the contextual cache. |
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320 |
if (m != null) { |
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321 |
final SnmpTableHandler handler = |
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322 |
(SnmpTableHandler)m.get("JvmThreadInstanceTable.handler"); |
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if (handler != null) return handler; |
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} |
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326 |
// No handler in contextual cache, make a new one. |
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final SnmpTableHandler handler = cache.getTableHandler(); |
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if (m != null && handler != null ) |
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m.put("JvmThreadInstanceTable.handler",handler); |
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return handler; |
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} |
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334 |
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335 |
private ThreadInfo getThreadInfo(long id) { |
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return JvmThreadingImpl.getThreadMXBean(). |
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getThreadInfo(id,MAX_STACK_TRACE_DEPTH); |
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} |
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339 |
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private ThreadInfo getThreadInfo(SnmpOid oid) { |
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return getThreadInfo(makeId(oid)); |
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} |
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343 |
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private JvmThreadInstanceEntryImpl getJvmThreadInstance(Object userData, |
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SnmpOid oid) { |
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JvmThreadInstanceEntryImpl cached = null; |
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String entryTag = null; |
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348 |
Map<Object, Object> map = null; |
|
349 |
final boolean dbg = log.isDebugOn(); |
|
350 |
||
351 |
if (userData instanceof Map) { |
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map = Util.cast(userData); |
|
353 |
||
354 |
// We're going to use this name to store/retrieve the entry in |
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// the request contextual cache. |
|
356 |
// |
|
357 |
// Revisit: Probably better programming to put all these strings |
|
358 |
// in some interface. |
|
359 |
// |
|
360 |
entryTag = "JvmThreadInstanceTable.entry." + oid.toString(); |
|
361 |
||
362 |
cached = (JvmThreadInstanceEntryImpl) map.get(entryTag); |
|
363 |
} |
|
364 |
||
365 |
// If the entry is in the cache, simply return it. |
|
366 |
// |
|
367 |
if (cached != null) { |
|
368 |
if (dbg) log.debug("*** getJvmThreadInstance", |
|
369 |
"Entry found in cache: " + entryTag); |
|
370 |
return cached; |
|
371 |
} |
|
372 |
||
373 |
if (dbg) log.debug("*** getJvmThreadInstance", "Entry [" + |
|
374 |
oid + "] is not in cache"); |
|
375 |
||
376 |
// Entry not in cache. We will create one if needed. |
|
377 |
// |
|
378 |
ThreadInfo info = null; |
|
379 |
try { |
|
380 |
info = getThreadInfo(oid); |
|
381 |
} catch (RuntimeException r) { |
|
382 |
log.trace("*** getJvmThreadInstance", |
|
383 |
"Failed to get thread info for rowOid: " + oid); |
|
384 |
log.debug("*** getJvmThreadInstance",r); |
|
385 |
} |
|
386 |
||
387 |
// No thread by that id => no entry. |
|
388 |
// |
|
389 |
if(info == null) { |
|
390 |
if (dbg) log.debug("*** getJvmThreadInstance", |
|
391 |
"No entry by that oid [" + oid + "]"); |
|
392 |
return null; |
|
393 |
} |
|
394 |
||
395 |
cached = new JvmThreadInstanceEntryImpl(info, oid.toByte()); |
|
396 |
if (map != null) map.put(entryTag, cached); |
|
397 |
if (dbg) log.debug("*** getJvmThreadInstance", |
|
398 |
"Entry created for Thread OID [" + oid + "]"); |
|
399 |
return cached; |
|
400 |
} |
|
401 |
||
402 |
static final MibLogger log = |
|
403 |
new MibLogger(JvmThreadInstanceTableMetaImpl.class); |
|
404 |
} |