/* * Copyright (c) 2004, 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.util.List;import java.util.Map; // 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.JvmRTBootClassPathTableMeta;import sun.management.snmp.util.SnmpCachedData;import sun.management.snmp.util.SnmpTableCache;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 "JvmRTBootClassPathTable".  */public class JvmRTBootClassPathTableMetaImpl    extends JvmRTBootClassPathTableMeta {     private SnmpTableCache cache;      /**     * A concrete implementation of {@link SnmpTableCache}, for the     * JvmRTBootClassPathTable.     **/    private static class JvmRTBootClassPathTableCache extends SnmpTableCache {        private JvmRTBootClassPathTableMetaImpl meta;         JvmRTBootClassPathTableCache(JvmRTBootClassPathTableMetaImpl meta,                                 long validity) {            this.meta = meta;            this.validity = validity;        }         /**         * 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 input args            final String[] path =                JvmRuntimeImpl.getBootClassPath(userData);             // Time stamp for the cache            final long time = System.currentTimeMillis();            final int len = path.length;             SnmpOid indexes[] = new SnmpOid[len];             for(int i = 0; i < len; i++) {                indexes[i] = new SnmpOid(i + 1);            }             return new SnmpCachedData(time, indexes, path);        }    }     /**     * Constructor for the table. Initialize metadata for     * "JvmRTBootClassPathTableMeta".     * The reference on the MBean server is updated so the entries     * created through an SNMP SET will be AUTOMATICALLY REGISTERED     * in Java DMK.     */    public JvmRTBootClassPathTableMetaImpl(SnmpMib myMib,                                       SnmpStandardObjectServer objserv) {        super(myMib, objserv);        cache = new JvmRTBootClassPathTableCache(this, -1);    }     // See com.sun.jmx.snmp.agent.SnmpMibTable    protected SnmpOid getNextOid(Object userData)        throws SnmpStatusException {        // 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 {        final boolean dbg = log.isDebugOn();        if (dbg) 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.            //            if (dbg) log.debug("getNextOid", "handler is null!");            throw new SnmpStatusException(SnmpStatusException.noSuchInstance);        }         // Get the next oid        //        final SnmpOid next = handler.getNext(oid);        if (dbg) 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;         return handler.contains(oid);    }     // See com.sun.jmx.snmp.agent.SnmpMibTable    public Object getEntry(SnmpOid oid)        throws SnmpStatusException {        final boolean dbg = log.isDebugOn();        if (dbg) log.debug("getEntry", "oid [" + oid + "]");        if (oid == null || oid.getLength() != 1) {            if (dbg) log.debug("getEntry", "Invalid oid [" + oid + "]");            throw new SnmpStatusException(SnmpStatusException.noSuchInstance);        }         // Get the request contextual cache (userData).        //        final Map<Object, Object> m = JvmContextFactory.getUserData();         // 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.        //        final String entryTag = ((m==null)?null:                                 ("JvmRTBootClassPathTable.entry." +                                  oid.toString()));         // If the entry is in the cache, simply return it.        //        if (m != null) {            final Object entry = m.get(entryTag);            if (entry != null) {                if (dbg)                    log.debug("getEntry", "Entry is already in the cache");                return entry;            } else                if (dbg) log.debug("getEntry", "Entry is not in the cache");        }         // The entry was not in the cache, make a new one.        //        // Get the data hanler.        //        SnmpTableHandler handler = getHandler(m);         // handler should never be null.        //        if (handler == null)            throw new SnmpStatusException(SnmpStatusException.noSuchInstance);         // Get the data associated with our entry.        //        final Object data = handler.getData(oid);         // data may be null if the OID we were given is not valid.        //        if (data == null)            throw new SnmpStatusException(SnmpStatusException.noSuchInstance);         // make the new entry (transient object that will be kept only        // for the duration of the request.        //        if (dbg)            log.debug("getEntry","data is a: " + data.getClass().getName());        final Object entry =            new JvmRTBootClassPathEntryImpl((String) data,                                            (int) oid.getOidArc(0));         // Put the entry in the cache in case we need it later while processing        // the request.        //        if (m != null && entry != null) {            m.put(entryTag,entry);        }         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("JvmRTBootClassPathTable.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("JvmRTBootClassPathTable.handler",handler);         return handler;    }     static final MibLogger log =        new MibLogger(JvmRTBootClassPathTableMetaImpl.class);}