geode-core/src/main/java/org/apache/geode/internal/cache/entries/VMThinDiskRegionEntryOffHeapObjectKey.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the License. You may obtain a
 * copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package org.apache.geode.internal.cache.entries;

// DO NOT modify this class. It was generated from LeafRegionEntry.cpp
import java.util.concurrent.atomic.AtomicLongFieldUpdater;

import org.apache.geode.internal.cache.DiskId;
import org.apache.geode.internal.cache.DiskStoreImpl;
import org.apache.geode.internal.cache.RegionEntry;
import org.apache.geode.internal.cache.RegionEntryContext;
import org.apache.geode.internal.cache.Token;
import org.apache.geode.internal.cache.eviction.EvictionController;
import org.apache.geode.internal.cache.persistence.DiskRecoveryStore;
import org.apache.geode.internal.offheap.OffHeapRegionEntryHelper;
import org.apache.geode.internal.offheap.annotations.Released;
import org.apache.geode.internal.offheap.annotations.Retained;
import org.apache.geode.internal.offheap.annotations.Unretained;
import org.apache.geode.internal.util.concurrent.CustomEntryConcurrentHashMap.HashEntry;

/*
 * macros whose definition changes this class:
 *
 * disk: DISK lru: LRU stats: STATS versioned: VERSIONED offheap: OFFHEAP
 *
 * One of the following key macros must be defined:
 *
 * key object: KEY_OBJECT key int: KEY_INT key long: KEY_LONG key uuid: KEY_UUID key string1:
 * KEY_STRING1 key string2: KEY_STRING2
 */
/**
 * Do not modify this class. It was generated. Instead modify LeafRegionEntry.cpp and then run
 * ./dev-tools/generateRegionEntryClasses.sh (it must be run from the top level directory).
 */
public class VMThinDiskRegionEntryOffHeapObjectKey extends VMThinDiskRegionEntryOffHeap {
  // --------------------------------------- common fields ----------------------------------------
  private static final AtomicLongFieldUpdater<VMThinDiskRegionEntryOffHeapObjectKey> LAST_MODIFIED_UPDATER =
      AtomicLongFieldUpdater.newUpdater(VMThinDiskRegionEntryOffHeapObjectKey.class,
          "lastModified");
  protected int hash;
  private HashEntry<Object, Object> nextEntry;
  @SuppressWarnings("unused")
  private volatile long lastModified;
  // --------------------------------------- offheap fields ---------------------------------------
  /**
   * All access done using OFF_HEAP_ADDRESS_UPDATER so it is used even though the compiler can not
   * tell it is.
   */
  @SuppressWarnings("unused")
  @Retained
  @Released
  private volatile long offHeapAddress;
  /**
   * I needed to add this because I wanted clear to call setValue which normally can only be called
   * while the re is synced. But if I sync in that code it causes a lock ordering deadlock with the
   * disk regions because they also get a rw lock in clear. Some hardware platforms do not support
   * CAS on a long. If gemfire is run on one of those the AtomicLongFieldUpdater does a sync on the
   * RegionEntry and we will once again be deadlocked. I don't know if we support any of the
   * hardware platforms that do not have a 64bit CAS. If we do then we can expect deadlocks on disk
   * regions.
   */
  private static final AtomicLongFieldUpdater<VMThinDiskRegionEntryOffHeapObjectKey> OFF_HEAP_ADDRESS_UPDATER =
      AtomicLongFieldUpdater.newUpdater(VMThinDiskRegionEntryOffHeapObjectKey.class,
          "offHeapAddress");
  // ---------------------------------------- disk fields -----------------------------------------
  /**
   * @since GemFire 5.1
   */
  protected DiskId id;
  // --------------------------------------- key fields -------------------------------------------
  // DO NOT modify this class. It was generated from LeafRegionEntry.cpp
  private final Object key;

  public VMThinDiskRegionEntryOffHeapObjectKey(final RegionEntryContext context, final Object key,
      @Retained final Object value) {
    super(context, (value instanceof RecoveredEntry ? null : value));
    // DO NOT modify this class. It was generated from LeafRegionEntry.cpp
    initialize(context, value);
    this.key = key;
  }

  // DO NOT modify this class. It was generated from LeafRegionEntry.cpp
  @Override
  public Token getValueAsToken() {
    return OffHeapRegionEntryHelper.getValueAsToken(this);
  }

  @Override
  protected Object getValueField() {
    return OffHeapRegionEntryHelper._getValue(this);
  }

  // DO NOT modify this class. It was generated from LeafRegionEntry.cpp
  @Override
  @Unretained
  protected void setValueField(@Unretained final Object value) {
    OffHeapRegionEntryHelper.setValue(this, value);
  }

  @Override
  @Retained
  public Object getValueRetain(final RegionEntryContext context, final boolean decompress) {
    return OffHeapRegionEntryHelper._getValueRetain(this, decompress, context);
  }

  @Override
  public long getAddress() {
    return OFF_HEAP_ADDRESS_UPDATER.get(this);
  }

  @Override
  public boolean setAddress(final long expectedAddress, long newAddress) {
    return OFF_HEAP_ADDRESS_UPDATER.compareAndSet(this, expectedAddress, newAddress);
  }

  @Override
  @Released
  public void release() {
    OffHeapRegionEntryHelper.releaseEntry(this);
  }

  @Override
  public void returnToPool() {
    // never implemented
  }

  @Override
  protected long getLastModifiedField() {
    return LAST_MODIFIED_UPDATER.get(this);
  }

  @Override
  protected boolean compareAndSetLastModifiedField(final long expectedValue, final long newValue) {
    return LAST_MODIFIED_UPDATER.compareAndSet(this, expectedValue, newValue);
  }

  @Override
  public int getEntryHash() {
    return this.hash;
  }

  @Override
  protected void setEntryHash(final int hash) {
    this.hash = hash;
  }

  @Override
  public HashEntry<Object, Object> getNextEntry() {
    return this.nextEntry;
  }

  @Override
  public void setNextEntry(final HashEntry<Object, Object> nextEntry) {
    this.nextEntry = nextEntry;
  }

  // ----------------------------------------- disk code ------------------------------------------
  // DO NOT modify this class. It was generated from LeafRegionEntry.cpp
  protected void initialize(final RegionEntryContext context, final Object value) {
    diskInitialize(context, value);
  }

  @Override
  public int updateAsyncEntrySize(final EvictionController evictionController) {
    throw new IllegalStateException("should never be called");
  }

  // DO NOT modify this class. It was generated from LeafRegionEntry.cpp
  @Override
  public DiskId getDiskId() {
    return this.id;
  }

  @Override
  public void setDiskId(final RegionEntry oldEntry) {
    this.id = ((DiskEntry) oldEntry).getDiskId();
  }

  private void diskInitialize(final RegionEntryContext context, final Object value) {
    DiskRecoveryStore diskRecoveryStore = (DiskRecoveryStore) context;
    DiskStoreImpl diskStore = diskRecoveryStore.getDiskStore();
    long maxOplogSize = diskStore.getMaxOplogSize();
    // get appropriate instance of DiskId implementation based on maxOplogSize
    this.id = DiskId.createDiskId(maxOplogSize, true, diskStore.needsLinkedList());
    Helper.initialize(this, diskRecoveryStore, value);
  }

  // ----------------------------------------- key code -------------------------------------------
  // DO NOT modify this class. It was generated from LeafRegionEntry.cpp
  @Override
  public Object getKey() {
    return this.key;
  }
  // DO NOT modify this class. It was generated from LeafRegionEntry.cpp
}