| /* |
| * 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; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| import org.apache.geode.CopyHelper; |
| import org.apache.geode.DataSerializer; |
| import org.apache.geode.cache.Region; |
| import org.apache.geode.internal.InternalDataSerializer; |
| import org.apache.geode.internal.cache.eviction.EvictableEntry; |
| import org.apache.geode.internal.lang.StringUtils; |
| import org.apache.geode.internal.serialization.DataSerializableFixedID; |
| import org.apache.geode.internal.serialization.DeserializationContext; |
| import org.apache.geode.internal.serialization.KnownVersion; |
| import org.apache.geode.internal.serialization.SerializationContext; |
| import org.apache.geode.pdx.PdxInstance; |
| |
| /** |
| * The first time someone asks this instance for its Object it will deserialize the bytes and from |
| * then on keep a reference to the deserialized form. So it "prefers deserialization". |
| * |
| */ |
| public class VMCachedDeserializable implements CachedDeserializable, DataSerializableFixedID { |
| |
| /** The cached value */ |
| private volatile Object value; |
| private int valueSize; // only set in constructor or fromData |
| |
| /** |
| * +PER_OBJECT_OVERHEAD for VMCachedDeserializable object +4 for value field +4 for valueSize |
| * field |
| */ |
| static final int MEM_OVERHEAD = PER_OBJECT_OVERHEAD + 4 + 4; |
| |
| /** |
| * zero-arg constructor for serialization only |
| */ |
| public VMCachedDeserializable() {} |
| |
| /** |
| * Creates a new instance of <code>VMCachedDeserializable</code>. |
| * |
| * Note that, in general, instances of this class should be obtained via |
| * {@link CachedDeserializableFactory}. |
| */ |
| public VMCachedDeserializable(byte[] serializedValue) { |
| if (serializedValue == null) { |
| throw new NullPointerException( |
| "value must not be null"); |
| } |
| value = serializedValue; |
| valueSize = CachedDeserializableFactory.getByteSize(serializedValue); |
| } |
| |
| VMCachedDeserializable(VMCachedDeserializable cd) { |
| value = cd.value; |
| valueSize = cd.valueSize; |
| } |
| |
| /** |
| * Create a new instance with an object and it's size. Note the caller decides if objectSize is |
| * the memory size or the serialized size. |
| * |
| */ |
| public VMCachedDeserializable(Object object, int objectSize) { |
| value = object; |
| valueSize = objectSize; |
| } |
| |
| @Override |
| public Object getDeserializedValue(Region r, RegionEntry re) { |
| Object v = value; |
| if (v instanceof byte[]) { |
| // org.apache.geode.internal.cache.GemFireCache.getInstance().getLogger().info("DEBUG |
| // getDeserializedValue r=" + r + " re=" + re, new RuntimeException("STACK")); |
| EvictableEntry le = null; |
| if (re != null) { |
| assert r != null; |
| if (re instanceof EvictableEntry) { |
| le = (EvictableEntry) re; |
| } |
| } |
| if (le != null) { |
| if (r instanceof PartitionedRegion) { |
| r = ((PartitionedRegion) r).getBucketRegion(re.getKey()); |
| } |
| boolean callFinish = false; |
| RegionMap regionMap = null; |
| if (r != null) { // fix for bug 44795 |
| regionMap = ((InternalRegion) r).getRegionMap(); |
| } |
| boolean threadAlreadySynced = Thread.holdsLock(le); |
| boolean isCacheListenerInvoked = re.isCacheListenerInvocationInProgress(); |
| synchronized (le) { |
| v = value; |
| if (!(v instanceof byte[])) { |
| return v; |
| } |
| v = EntryEventImpl.deserialize((byte[]) v); |
| if (threadAlreadySynced && !isCacheListenerInvoked) { |
| // to fix bug 43355 and 43409 don't change the value form |
| // if the thread that called us was already synced. |
| return v; |
| } |
| if (!(v instanceof PdxInstance)) { |
| value = v; |
| if (regionMap != null) { |
| callFinish = regionMap.beginChangeValueForm(le, this, v); |
| } |
| } |
| } |
| if (callFinish && !isCacheListenerInvoked) { |
| regionMap.finishChangeValueForm(); |
| } |
| } else { |
| // we sync on this so we will only do one deserialize |
| synchronized (this) { |
| v = value; |
| if (!(v instanceof byte[])) { |
| return v; |
| } |
| v = EntryEventImpl.deserialize((byte[]) v); |
| if (!(v instanceof PdxInstance)) { |
| value = v; |
| } |
| // ObjectSizer os = null; |
| // if (r != null) { |
| // EvictionAttributes ea = r.getAttributes().getEvictionAttributes(); |
| // if (ea != null) { |
| // os = ea.getObjectSizer(); |
| // } |
| // int vSize = CachedDeserializableFactory.calcMemSize(v, os, false, false); |
| // if (vSize != -1) { |
| // int oldSize = this.valueSize; |
| // this.valueSize = vSize; |
| // if (r instanceof BucketRegion) { |
| // BucketRegion br = (BucketRegion)r; |
| // br.updateBucketMemoryStats(vSize - oldSize); |
| // } |
| // // @todo do we need to update some lru stats since the size changed? |
| // } |
| // // If vSize == -1 then leave valueSize as is which is the serialized size. |
| } |
| } |
| } |
| return v; |
| } |
| |
| @Override |
| public Object getDeserializedForReading() { |
| Object v = value; |
| if (v instanceof byte[]) { |
| return EntryEventImpl.deserialize((byte[]) v); |
| } else { |
| return v; |
| } |
| } |
| |
| @Override |
| public Object getDeserializedWritableCopy(Region r, RegionEntry re) { |
| Object v = value; |
| if (v instanceof byte[]) { |
| Object result = EntryEventImpl.deserialize((byte[]) v); |
| if (CopyHelper.isWellKnownImmutableInstance(result) && !(result instanceof PdxInstance)) { |
| // Since it is immutable go ahead and change the form |
| // since we can return the immutable instance each time. |
| result = getDeserializedValue(r, re); |
| } |
| return result; |
| } else { |
| return CopyHelper.copy(v); |
| } |
| } |
| |
| /** |
| * Return the serialized value as a byte[] |
| */ |
| @Override |
| public byte[] getSerializedValue() { |
| Object v = value; |
| if (v instanceof byte[]) { |
| return (byte[]) v; |
| } |
| return EntryEventImpl.serialize(v); |
| } |
| |
| /** |
| * Return current value regardless of whether it is serialized or deserialized: if it was |
| * serialized than it is a byte[], otherwise it is not a byte[]. |
| */ |
| @Override |
| public Object getValue() { |
| return value; |
| } |
| |
| @Override |
| public int getSizeInBytes() { |
| return MEM_OVERHEAD + valueSize; |
| } |
| |
| @Override |
| public int getValueSizeInBytes() { |
| return valueSize; |
| } |
| |
| @Override |
| public int getDSFID() { |
| return VM_CACHED_DESERIALIZABLE; |
| } |
| |
| @Override |
| public void fromData(DataInput in, |
| DeserializationContext context) throws IOException, ClassNotFoundException { |
| // fix for bug 38309 |
| byte[] bytes = DataSerializer.readByteArray(in); |
| valueSize = bytes.length; |
| value = bytes; |
| } |
| |
| @Override |
| public void toData(DataOutput out, |
| SerializationContext context) throws IOException { |
| // fix for bug 38309 |
| DataSerializer.writeObjectAsByteArray(getValue(), out); |
| } |
| |
| String getShortClassName() { |
| String cname = getClass().getName(); |
| return cname.substring(getClass().getPackage().getName().length() + 1); |
| } |
| |
| @Override |
| public String toString() { |
| return getShortClassName() + "@" + hashCode(); |
| } |
| |
| @Override |
| public void writeValueAsByteArray(DataOutput out) throws IOException { |
| toData(out, InternalDataSerializer.createSerializationContext(out)); |
| } |
| |
| @Override |
| public void fillSerializedValue(BytesAndBitsForCompactor wrapper, byte userBits) { |
| Object v = value; |
| if (v instanceof byte[]) { |
| wrapper.setData((byte[]) v, userBits, ((byte[]) v).length, |
| false /* Not Reusable as it refers to underlying value */); |
| } else { |
| EntryEventImpl.fillSerializedValue(wrapper, v, userBits); |
| } |
| |
| } |
| |
| @Override |
| public String getStringForm() { |
| try { |
| return StringUtils.forceToString(getDeserializedForReading()); |
| } catch (RuntimeException ex) { |
| return "Could not convert object to string because " + ex; |
| } |
| } |
| |
| @Override |
| public KnownVersion[] getSerializationVersions() { |
| return null; |
| } |
| |
| @Override |
| public boolean isSerialized() { |
| return true; |
| } |
| |
| @Override |
| public boolean usesHeapForStorage() { |
| return true; |
| } |
| } |