| /* |
| * 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.versions; |
| |
| |
| /** |
| * A in memory representation of a VersionTag that is more compact than the VersionTag. |
| * |
| * The version tag class has accumulated some temporary flags that make in undesirable to retain a |
| * reference for long periods of type. |
| * |
| * This class is used store version tags that are pending writing to a krf. |
| * |
| */ |
| public class CompactVersionHolder<T extends VersionSource> implements VersionHolder<T> { |
| ////// VersionStamp implementation |
| private final T memberID; |
| private final short entryVersionLowBytes; |
| private final short regionVersionHighBytes; |
| private final int regionVersionLowBytes; |
| private final byte entryVersionHighByte; |
| private final byte distributedSystemId; |
| private final long versionTimeStamp; |
| |
| public CompactVersionHolder(VersionHolder<T> tag) { |
| int eVersion = tag.getEntryVersion(); |
| entryVersionLowBytes = (short) (eVersion & 0xffff); |
| entryVersionHighByte = (byte) ((eVersion & 0xff0000) >> 16); |
| regionVersionHighBytes = tag.getRegionVersionHighBytes(); |
| regionVersionLowBytes = tag.getRegionVersionLowBytes(); |
| versionTimeStamp = tag.getVersionTimeStamp(); |
| distributedSystemId = (byte) (tag.getDistributedSystemId() & 0xff); |
| memberID = tag.getMemberID(); |
| } |
| |
| |
| |
| @Override |
| public int getEntryVersion() { |
| return ((entryVersionHighByte << 16) & 0xFF0000) | (entryVersionLowBytes & 0xFFFF); |
| } |
| |
| @Override |
| public long getRegionVersion() { |
| return (((long) regionVersionHighBytes) << 32) | (regionVersionLowBytes & 0x00000000FFFFFFFFL); |
| } |
| |
| @Override |
| public long getVersionTimeStamp() { |
| return versionTimeStamp; |
| } |
| |
| @Override |
| public T getMemberID() { |
| return memberID; |
| } |
| |
| @Override |
| public int getDistributedSystemId() { |
| return distributedSystemId; |
| } |
| |
| public VersionTag asVersionTag() { |
| VersionTag tag = VersionTag.create(memberID); |
| tag.setEntryVersion(getEntryVersion()); |
| tag.setRegionVersion(regionVersionHighBytes, regionVersionLowBytes); |
| tag.setVersionTimeStamp(getVersionTimeStamp()); |
| tag.setDistributedSystemId(distributedSystemId); |
| return tag; |
| } |
| |
| /** get rvv internal high byte. Used by region entries for transferring to storage */ |
| @Override |
| public short getRegionVersionHighBytes() { |
| return regionVersionHighBytes; |
| } |
| |
| /** get rvv internal low bytes. Used by region entries for transferring to storage */ |
| @Override |
| public int getRegionVersionLowBytes() { |
| return regionVersionLowBytes; |
| } |
| |
| public String toString() { |
| StringBuilder s = new StringBuilder(); |
| s.append("{v").append(getEntryVersion()); |
| s.append("; rv").append(getRegionVersion()); |
| if (memberID != null) { |
| s.append("; mbr=").append(memberID); |
| } |
| if (distributedSystemId >= 0) { |
| s.append("; ds=").append(distributedSystemId); |
| } |
| s.append("; time=").append(getVersionTimeStamp()); |
| s.append("}"); |
| return s.toString(); |
| } |
| |
| } |