/* * Copyright (c) 2003, 2006, 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 {     /**     * 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 {         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 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<SnmpOid, Object>(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 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);}