--- a/jdk/src/jdk.snmp/share/classes/sun/management/snmp/jvminstr/JvmThreadInstanceTableMetaImpl.java Mon Oct 27 17:54:00 2014 +0530
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,404 +0,0 @@
-/*
- * Copyright (c) 2003, 2012, 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.management.snmp.jvminstr;
-
-// java imports
-//
-import com.sun.jmx.mbeanserver.Util;
-import java.io.Serializable;
-import java.util.Vector;
-import java.util.Map;
-import java.util.TreeMap;
-import java.util.Enumeration;
-
-import java.lang.management.ThreadInfo;
-import java.lang.management.ManagementFactory;
-
-// jmx imports
-//
-import javax.management.MBeanServer;
-import javax.management.ObjectName;
-import com.sun.jmx.snmp.SnmpCounter;
-import com.sun.jmx.snmp.SnmpCounter64;
-import com.sun.jmx.snmp.SnmpGauge;
-import com.sun.jmx.snmp.SnmpInt;
-import com.sun.jmx.snmp.SnmpUnsignedInt;
-import com.sun.jmx.snmp.SnmpIpAddress;
-import com.sun.jmx.snmp.SnmpTimeticks;
-import com.sun.jmx.snmp.SnmpOpaque;
-import com.sun.jmx.snmp.SnmpString;
-import com.sun.jmx.snmp.SnmpStringFixed;
-import com.sun.jmx.snmp.SnmpOid;
-import com.sun.jmx.snmp.SnmpNull;
-import com.sun.jmx.snmp.SnmpValue;
-import com.sun.jmx.snmp.SnmpVarBind;
-import com.sun.jmx.snmp.SnmpStatusException;
-
-// jdmk imports
-//
-import com.sun.jmx.snmp.agent.SnmpIndex;
-import com.sun.jmx.snmp.agent.SnmpMib;
-import com.sun.jmx.snmp.agent.SnmpMibTable;
-import com.sun.jmx.snmp.agent.SnmpMibSubRequest;
-import com.sun.jmx.snmp.agent.SnmpStandardObjectServer;
-
-import sun.management.snmp.jvmmib.JvmThreadInstanceEntryMBean;
-import sun.management.snmp.jvmmib.JvmThreadInstanceTableMeta;
-import sun.management.snmp.util.SnmpTableCache;
-import sun.management.snmp.util.SnmpCachedData;
-import sun.management.snmp.util.SnmpTableHandler;
-import sun.management.snmp.util.MibLogger;
-import sun.management.snmp.util.JvmContextFactory;
-
-/**
- * The class is used for implementing the "JvmThreadInstanceTable" group.
- */
-public class JvmThreadInstanceTableMetaImpl
- extends JvmThreadInstanceTableMeta {
-
- static final long serialVersionUID = -8432271929226397492L;
-
- /**
- * Maximum depth of the stacktrace that might be returned through
- * SNMP.
- *
- * Since we do not export the stack trace through SNMP, we set
- * MAX_STACK_TRACE_DEPTH=0 so that ThreadMXBean.getThreadInfo(long) does
- * not compute the stack trace.
- *
- **/
- public static final int MAX_STACK_TRACE_DEPTH=0;
-
- /**
- * Translate from a long to a Oid. Arc follow the long big-endian order.
- * @param l The long to make the index from
- * @return The arc array.
- */
- static SnmpOid makeOid(long l) {
- long[] x = new long [8];
- x[0] = (l >> 56) & 0xFF;
- x[1] = (l >> 48) & 0x00FF;
- x[2] = (l >> 40) & 0x0000FF;
- x[3] = (l >> 32) & 0x000000FF;
- x[4] = (l >> 24) & 0x00000000FF;
- x[5] = (l >> 16) & 0x0000000000FF;
- x[6] = (l >> 8) & 0x000000000000FF;
- x[7] = l & 0x00000000000000FF;
- return new SnmpOid(x);
- }
-
- /**
- * Translate an Oid to a thread id. Arc follow the long big-endian order.
- * @param oid The oid to make the id from
- * @return The thread id.
- */
- static long makeId(SnmpOid oid) {
- long id = 0;
- long[] arcs = oid.longValue(false);
-
- id |= arcs[0] << 56;
- id |= arcs[1] << 48;
- id |= arcs[2] << 40;
- id |= arcs[3] << 32;
- id |= arcs[4] << 24;
- id |= arcs[5] << 16;
- id |= arcs[6] << 8;
- id |= arcs[7];
-
- return id;
- }
-
- /**
- * A concrete implementation of {@link SnmpTableCache}, for the
- * JvmThreadInstanceTable.
- **/
- private static class JvmThreadInstanceTableCache
- extends SnmpTableCache {
-
- static final long serialVersionUID = 4947330124563406878L;
- final private JvmThreadInstanceTableMetaImpl meta;
-
- /**
- * Create a weak cache for the JvmThreadInstanceTable.
- * @param validity validity of the cached data, in ms.
- **/
- JvmThreadInstanceTableCache(JvmThreadInstanceTableMetaImpl meta,
- long validity) {
- this.validity = validity;
- this.meta = meta;
- }
-
- /**
- * Call <code>getTableDatas(JvmContextFactory.getUserData())</code>.
- **/
- public SnmpTableHandler getTableHandler() {
- final Map<Object, Object> userData = JvmContextFactory.getUserData();
- return getTableDatas(userData);
- }
-
- /**
- * Return a table handler containing the Thread indexes.
- * Indexes are computed from the ThreadId.
- **/
- protected SnmpCachedData updateCachedDatas(Object userData) {
-
- // We are getting all the thread ids. WARNING.
- // Some of them will be not valid when accessed for data...
- // See getEntry
- long[] id = JvmThreadingImpl.getThreadMXBean().getAllThreadIds();
-
-
- // Time stamp for the cache
- final long time = System.currentTimeMillis();
-
- SnmpOid indexes[] = new SnmpOid[id.length];
- final TreeMap<SnmpOid, Object> table =
- new TreeMap<>(SnmpCachedData.oidComparator);
- for(int i = 0; i < id.length; i++) {
- log.debug("", "Making index for thread id [" + id[i] +"]");
- //indexes[i] = makeOid(id[i]);
- SnmpOid oid = makeOid(id[i]);
- table.put(oid, oid);
- }
-
- return new SnmpCachedData(time, table);
- }
-
- }
-
-
- // The weak cache for this table.
- protected SnmpTableCache cache;
-
- /**
- * Constructor for the table. Initialize metadata for
- * "JvmThreadInstanceTableMeta".
- * The reference on the MBean server is updated so the entries created
- * through an SNMP SET will be AUTOMATICALLY REGISTERED in Java DMK.
- */
- public JvmThreadInstanceTableMetaImpl(SnmpMib myMib,
- SnmpStandardObjectServer objserv) {
- super(myMib, objserv);
- cache = new JvmThreadInstanceTableCache(this,
- ((JVM_MANAGEMENT_MIB_IMPL)myMib).validity());
- log.debug("JvmThreadInstanceTableMetaImpl", "Create Thread meta");
- }
-
- // See com.sun.jmx.snmp.agent.SnmpMibTable
- protected SnmpOid getNextOid(Object userData)
- throws SnmpStatusException {
- log.debug("JvmThreadInstanceTableMetaImpl", "getNextOid");
- // null means get the first OID.
- return getNextOid(null,userData);
- }
-
- // See com.sun.jmx.snmp.agent.SnmpMibTable
- protected SnmpOid getNextOid(SnmpOid oid, Object userData)
- throws SnmpStatusException {
- log.debug("getNextOid", "previous=" + oid);
-
-
- // Get the data handler.
- //
- SnmpTableHandler handler = getHandler(userData);
- if (handler == null) {
- // This should never happen.
- // If we get here it's a bug.
- //
- log.debug("getNextOid", "handler is null!");
- throw new SnmpStatusException(SnmpStatusException.noSuchInstance);
- }
-
- // Get the next oid
- //
- SnmpOid next = oid;
- while(true) {
- next = handler.getNext(next);
- if (next == null) break;
- if (getJvmThreadInstance(userData,next) != null) break;
- }
-
- log.debug("*** **** **** **** getNextOid", "next=" + next);
-
- // if next is null: we reached the end of the table.
- //
- if (next == null)
- throw new SnmpStatusException(SnmpStatusException.noSuchInstance);
-
- return next;
- }
-
- // See com.sun.jmx.snmp.agent.SnmpMibTable
- protected boolean contains(SnmpOid oid, Object userData) {
-
- // Get the handler.
- //
- SnmpTableHandler handler = getHandler(userData);
-
- // handler should never be null.
- //
- if (handler == null)
- return false;
- if(!handler.contains(oid))
- return false;
-
- JvmThreadInstanceEntryImpl inst = getJvmThreadInstance(userData, oid);
- return (inst != null);
- }
-
-
- // See com.sun.jmx.snmp.agent.SnmpMibTable
- public Object getEntry(SnmpOid oid)
- throws SnmpStatusException {
- log.debug("*** **** **** **** getEntry", "oid [" + oid + "]");
- if (oid == null || oid.getLength() != 8) {
- log.debug("getEntry", "Invalid oid [" + oid + "]");
- throw new SnmpStatusException(SnmpStatusException.noSuchInstance);
- }
-
- // Get the request contextual cache (userData).
- //
- final Map<Object,Object> m = JvmContextFactory.getUserData();
-
- // Get the handler.
- //
- SnmpTableHandler handler = getHandler(m);
-
- // handler should never be null.
- //
- if (handler == null || !handler.contains(oid))
- throw new SnmpStatusException(SnmpStatusException.noSuchInstance);
-
- final JvmThreadInstanceEntryImpl entry = getJvmThreadInstance(m,oid);
-
- if (entry == null)
- throw new SnmpStatusException(SnmpStatusException.noSuchInstance);
-
- return entry;
- }
-
- /**
- * Get the SnmpTableHandler that holds the jvmThreadInstanceTable data.
- * First look it up in the request contextual cache, and if it is
- * not found, obtain it from the weak cache.
- * <br>The request contextual cache will be released at the end of the
- * current requests, and is used only to process this request.
- * <br>The weak cache is shared by all requests, and is only
- * recomputed when it is found to be obsolete.
- * <br>Note that the data put in the request contextual cache is
- * never considered to be obsolete, in order to preserve data
- * coherency.
- **/
- protected SnmpTableHandler getHandler(Object userData) {
- final Map<Object, Object> m;
- if (userData instanceof Map) m=Util.cast(userData);
- else m=null;
-
- // Look in the contextual cache.
- if (m != null) {
- final SnmpTableHandler handler =
- (SnmpTableHandler)m.get("JvmThreadInstanceTable.handler");
- if (handler != null) return handler;
- }
-
- // No handler in contextual cache, make a new one.
- final SnmpTableHandler handler = cache.getTableHandler();
-
- if (m != null && handler != null )
- m.put("JvmThreadInstanceTable.handler",handler);
-
- return handler;
- }
-
- private ThreadInfo getThreadInfo(long id) {
- return JvmThreadingImpl.getThreadMXBean().
- getThreadInfo(id,MAX_STACK_TRACE_DEPTH);
- }
-
- private ThreadInfo getThreadInfo(SnmpOid oid) {
- return getThreadInfo(makeId(oid));
- }
-
- private JvmThreadInstanceEntryImpl getJvmThreadInstance(Object userData,
- SnmpOid oid) {
- JvmThreadInstanceEntryImpl cached = null;
- String entryTag = null;
- Map<Object, Object> map = null;
- final boolean dbg = log.isDebugOn();
-
- if (userData instanceof Map) {
- map = Util.cast(userData);
-
- // We're going to use this name to store/retrieve the entry in
- // the request contextual cache.
- //
- // Revisit: Probably better programming to put all these strings
- // in some interface.
- //
- entryTag = "JvmThreadInstanceTable.entry." + oid.toString();
-
- cached = (JvmThreadInstanceEntryImpl) map.get(entryTag);
- }
-
- // If the entry is in the cache, simply return it.
- //
- if (cached != null) {
- if (dbg) log.debug("*** getJvmThreadInstance",
- "Entry found in cache: " + entryTag);
- return cached;
- }
-
- if (dbg) log.debug("*** getJvmThreadInstance", "Entry [" +
- oid + "] is not in cache");
-
- // Entry not in cache. We will create one if needed.
- //
- ThreadInfo info = null;
- try {
- info = getThreadInfo(oid);
- } catch (RuntimeException r) {
- log.trace("*** getJvmThreadInstance",
- "Failed to get thread info for rowOid: " + oid);
- log.debug("*** getJvmThreadInstance",r);
- }
-
- // No thread by that id => no entry.
- //
- if(info == null) {
- if (dbg) log.debug("*** getJvmThreadInstance",
- "No entry by that oid [" + oid + "]");
- return null;
- }
-
- cached = new JvmThreadInstanceEntryImpl(info, oid.toByte());
- if (map != null) map.put(entryTag, cached);
- if (dbg) log.debug("*** getJvmThreadInstance",
- "Entry created for Thread OID [" + oid + "]");
- return cached;
- }
-
- static final MibLogger log =
- new MibLogger(JvmThreadInstanceTableMetaImpl.class);
-}