--- old/src/jdk.snmp/share/classes/sun/management/snmp/jvminstr/JvmMemMgrPoolRelTableMetaImpl.java 2014-10-15 14:06:47.000000000 +0200
+++ /dev/null 2014-10-15 14:06:47.000000000 +0200
@@ -1,523 +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.List;
-import java.util.Iterator;
-import java.util.Map;
-import java.util.HashMap;
-import java.util.TreeMap;
-import java.util.Collections;
-
-// jmx imports
-//
-import javax.management.MBeanServer;
-import javax.management.ObjectName;
-import com.sun.jmx.snmp.SnmpOid;
-import com.sun.jmx.snmp.SnmpStatusException;
-
-// jdmk imports
-//
-import com.sun.jmx.snmp.agent.SnmpMib;
-import com.sun.jmx.snmp.agent.SnmpStandardObjectServer;
-import com.sun.jmx.snmp.agent.SnmpMibTable;
-
-import java.lang.management.MemoryManagerMXBean;
-import java.lang.management.MemoryPoolMXBean;
-
-import sun.management.snmp.jvmmib.JvmMemMgrPoolRelTableMeta;
-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 "JvmMemMgrPoolRelTable" group.
- */
-public class JvmMemMgrPoolRelTableMetaImpl extends JvmMemMgrPoolRelTableMeta
- implements Serializable {
-
- static final long serialVersionUID = 1896509775012355443L;
-
- /**
- * A concrete implementation of {@link SnmpTableCache}, for the
- * jvmMemMgrPoolRelTable.
- **/
-
- private static class JvmMemMgrPoolRelTableCache
- extends SnmpTableCache {
-
- static final long serialVersionUID = 6059937161990659184L;
- final private JvmMemMgrPoolRelTableMetaImpl meta;
-
- /**
- * Create a weak cache for the jvmMemMgrPoolRelTable.
- * @param validity validity of the cached data, in ms.
- **/
- JvmMemMgrPoolRelTableCache(JvmMemMgrPoolRelTableMetaImpl meta,
- long validity) {
- this.validity = validity;
- this.meta = meta;
- }
-
- /**
- * Call getTableDatas(JvmContextFactory.getUserData()).
- **/
- public SnmpTableHandler getTableHandler() {
- final Map userData = JvmContextFactory.getUserData();
- return getTableDatas(userData);
- }
-
- /**
- * Builds a map pool-name => pool-index from the SnmpTableHandler
- * of the JvmMemPoolTable.
- **/
- private static Map buildPoolIndexMap(SnmpTableHandler handler) {
- // optimization...
- if (handler instanceof SnmpCachedData)
- return buildPoolIndexMap((SnmpCachedData)handler);
-
- // not optimizable... too bad.
- final Map m = new HashMap<>();
- SnmpOid index=null;
- while ((index = handler.getNext(index))!=null) {
- final MemoryPoolMXBean mpm =
- (MemoryPoolMXBean)handler.getData(index);
- if (mpm == null) continue;
- final String name = mpm.getName();
- if (name == null) continue;
- m.put(name,index);
- }
- return m;
- }
-
- /**
- * Builds a map pool-name => pool-index from the SnmpTableHandler
- * of the JvmMemPoolTable.
- * Optimized algorithm.
- **/
- private static Map buildPoolIndexMap(SnmpCachedData cached) {
- if (cached == null) return Collections.emptyMap();
- final SnmpOid[] indexes = cached.indexes;
- final Object[] datas = cached.datas;
- final int len = indexes.length;
- final Map m = new HashMap<>(len);
- for (int i=0; iManagementFactory.getMemoryMBean().getMemoryManagers()
- * and caches the value.
- * This ensures that
- * ManagementFactory.getMemoryMBean().getMemoryManagers()
- * is not called more than once per request, thus ensuring a
- * consistent view of the table.
- **/
- protected SnmpCachedData updateCachedDatas(Object userData) {
- // Get the MemoryManager table
- final SnmpTableHandler mmHandler =
- meta.getManagerHandler(userData);
-
- // Get the MemoryPool table
- final SnmpTableHandler mpHandler =
- meta.getPoolHandler(userData);
-
- // Time stamp for the cache
- final long time = System.currentTimeMillis();
-
- // Build a Map poolname -> index
- final Map poolIndexMap = buildPoolIndexMap(mpHandler);
-
- // For each memory manager, get the list of memory pools
- // For each memory pool, find its index in the memory pool table
- // Create a row in the relation table.
- final TreeMap table =
- new TreeMap<>(SnmpCachedData.oidComparator);
- updateTreeMap(table,userData,mmHandler,mpHandler,poolIndexMap);
-
- return new SnmpCachedData(time,table);
- }
-
-
- /**
- * Get the list of memory pool associated with the
- * given MemoryManagerMXBean.
- **/
- protected String[] getMemoryPools(Object userData,
- MemoryManagerMXBean mmm, long mmarc) {
- final String listTag =
- "JvmMemManager." + mmarc + ".getMemoryPools";
-
- String[] result=null;
- if (userData instanceof Map) {
- result = (String[])((Map)userData).get(listTag);
- if (result != null) return result;
- }
-
- if (mmm!=null) {
- result = mmm.getMemoryPoolNames();
- }
- if ((result!=null)&&(userData instanceof Map)) {
- Map map = Util.cast(userData);
- map.put(listTag,result);
- }
-
- return result;
- }
-
- protected void updateTreeMap(TreeMap table, Object userData,
- MemoryManagerMXBean mmm,
- SnmpOid mmIndex,
- Map poolIndexMap) {
-
- // The MemoryManager index is an int, so it's the first
- // and only subidentifier.
- final long mmarc;
- try {
- mmarc = mmIndex.getOidArc(0);
- } catch (SnmpStatusException x) {
- log.debug("updateTreeMap",
- "Bad MemoryManager OID index: "+mmIndex);
- log.debug("updateTreeMap",x);
- return;
- }
-
-
- // Cache this in userData + get it from cache?
- final String[] mpList = getMemoryPools(userData,mmm,mmarc);
- if (mpList == null || mpList.length < 1) return;
-
- final String mmmName = mmm.getName();
- for (int i = 0; i < mpList.length; i++) {
- final String mpmName = mpList[i];
- if (mpmName == null) continue;
- final SnmpOid mpIndex = poolIndexMap.get(mpmName);
- if (mpIndex == null) continue;
-
- // The MemoryPool index is an int, so it's the first
- // and only subidentifier.
- final long mparc;
- try {
- mparc = mpIndex.getOidArc(0);
- } catch (SnmpStatusException x) {
- log.debug("updateTreeMap","Bad MemoryPool OID index: " +
- mpIndex);
- log.debug("updateTreeMap",x);
- continue;
- }
- // The MemoryMgrPoolRel table indexed is composed
- // of the MemoryManager index, to which the MemoryPool
- // index is appended.
- final long[] arcs = { mmarc, mparc };
-
- final SnmpOid index = new SnmpOid(arcs);
-
- table.put(index, new JvmMemMgrPoolRelEntryImpl(mmmName,
- mpmName,
- (int)mmarc,
- (int)mparc));
- }
- }
-
- protected void updateTreeMap(TreeMap table, Object userData,
- SnmpTableHandler mmHandler,
- SnmpTableHandler mpHandler,
- Map poolIndexMap) {
- if (mmHandler instanceof SnmpCachedData) {
- updateTreeMap(table,userData,(SnmpCachedData)mmHandler,
- mpHandler,poolIndexMap);
- return;
- }
-
- SnmpOid mmIndex=null;
- while ((mmIndex = mmHandler.getNext(mmIndex))!=null) {
- final MemoryManagerMXBean mmm =
- (MemoryManagerMXBean)mmHandler.getData(mmIndex);
- if (mmm == null) continue;
- updateTreeMap(table,userData,mmm,mmIndex,poolIndexMap);
- }
- }
-
- protected void updateTreeMap(TreeMap table, Object userData,
- SnmpCachedData mmHandler,
- SnmpTableHandler mpHandler,
- Map poolIndexMap) {
-
- final SnmpOid[] indexes = mmHandler.indexes;
- final Object[] datas = mmHandler.datas;
- final int size = indexes.length;
- for (int i=size-1; i>-1; i--) {
- final MemoryManagerMXBean mmm =
- (MemoryManagerMXBean)datas[i];
- if (mmm == null) continue;
- updateTreeMap(table,userData,mmm,indexes[i],poolIndexMap);
- }
- }
- }
-
- // The weak cache for this table.
- protected SnmpTableCache cache;
-
- private transient JvmMemManagerTableMetaImpl managers = null;
- private transient JvmMemPoolTableMetaImpl pools = null;
-
- /**
- * Constructor for the table. Initialize metadata for
- * "JvmMemMgrPoolRelTableMeta".
- * The reference on the MBean server is updated so the entries
- * created through an SNMP SET will be AUTOMATICALLY REGISTERED
- * in Java DMK.
- */
- public JvmMemMgrPoolRelTableMetaImpl(SnmpMib myMib,
- SnmpStandardObjectServer objserv) {
- super(myMib,objserv);
- this.cache = new
- JvmMemMgrPoolRelTableCache(this,((JVM_MANAGEMENT_MIB_IMPL)myMib).
- validity());
- }
-
- // Returns a pointer to the JvmMemManager meta node - we're going
- // to reuse its SnmpTableHandler in order to implement the
- // relation table.
- private final JvmMemManagerTableMetaImpl getManagers(SnmpMib mib) {
- if (managers == null) {
- managers = (JvmMemManagerTableMetaImpl)
- mib.getRegisteredTableMeta("JvmMemManagerTable");
- }
- return managers;
- }
-
- // Returns a pointer to the JvmMemPool meta node - we're going
- // to reuse its SnmpTableHandler in order to implement the
- // relation table.
- private final JvmMemPoolTableMetaImpl getPools(SnmpMib mib) {
- if (pools == null) {
- pools = (JvmMemPoolTableMetaImpl)
- mib.getRegisteredTableMeta("JvmMemPoolTable");
- }
- return pools;
- }
-
- /**
- * Returns the JvmMemManagerTable SnmpTableHandler
- **/
- protected SnmpTableHandler getManagerHandler(Object userData) {
- final JvmMemManagerTableMetaImpl managerTable = getManagers(theMib);
- return managerTable.getHandler(userData);
- }
-
- /**
- * Returns the JvmMemPoolTable SnmpTableHandler
- **/
- protected SnmpTableHandler getPoolHandler(Object userData) {
- final JvmMemPoolTableMetaImpl poolTable = getPools(theMib);
- return poolTable.getHandler(userData);
- }
-
- // 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 {
-
- if (oid == null || oid.getLength() < 2)
- throw new SnmpStatusException(SnmpStatusException.noSuchInstance);
-
- // Get the request contextual cache (userData).
- //
- final Map m = JvmContextFactory.getUserData();
-
- // We know in the case of this table that the index is composed
- // of two integers,
- // o The MemoryManager is the first OID arc of the index OID.
- // o The MemoryPool is the second OID arc of the index OID.
- //
- final long mgrIndex = oid.getOidArc(0);
- final long poolIndex = oid.getOidArc(1);
-
- // 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:
- ("JvmMemMgrPoolRelTable.entry." +
- mgrIndex + "." + poolIndex));
-
- // If the entry is in the cache, simply return it.
- //
- if (m != null) {
- final Object entry = m.get(entryTag);
- if (entry != null) return entry;
- }
-
- // 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 instanceof JvmMemMgrPoolRelEntryImpl))
- throw new SnmpStatusException(SnmpStatusException.noSuchInstance);
-
- // make the new entry (transient object that will be kept only
- // for the duration of the request.
- //
- final Object entry = (JvmMemMgrPoolRelEntryImpl)data;
- // XXXXX Revisit
- // new JvmMemMgrPoolRelEntryImpl((MemoryManagerMXBean)data,
- // (int)mgrIndex,(int)poolIndex);
-
- // 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 jvmMemManagerTable data.
- * First look it up in the request contextual cache, and if it is
- * not found, obtain it from the weak cache.
- *
The request contextual cache will be released at the end of the
- * current requests, and is used only to process this request.
- *
The weak cache is shared by all requests, and is only
- * recomputed when it is found to be obsolete.
- *
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 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("JvmMemMgrPoolRelTable.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("JvmMemMgrPoolRelTable.handler",handler);
-
- return handler;
- }
-
- static final MibLogger log =
- new MibLogger(JvmMemMgrPoolRelTableMetaImpl.class);
-}