| /* |
| * 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); |
| } |
