UpgradeObject.java
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上传日期:2018-01-08
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文件大小:2k
- /**
- * 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.hadoop.hdfs.server.common;
- import java.io.IOException;
- import org.apache.hadoop.hdfs.server.common.UpgradeObjectCollection.UOSignature;
- /**
- * Abstract upgrade object.
- *
- * Contains default implementation of common methods of {@link Upgradeable}
- * interface.
- */
- public abstract class UpgradeObject implements Upgradeable {
- protected short status;
-
- public short getUpgradeStatus() {
- return status;
- }
- public String getDescription() {
- return "Upgrade object for " + getType() + " layout version " + getVersion();
- }
- public UpgradeStatusReport getUpgradeStatusReport(boolean details)
- throws IOException {
- return new UpgradeStatusReport(getVersion(), getUpgradeStatus(), false);
- }
- public int compareTo(Upgradeable o) {
- if(this.getVersion() != o.getVersion())
- return (getVersion() > o.getVersion() ? -1 : 1);
- int res = this.getType().toString().compareTo(o.getType().toString());
- if(res != 0)
- return res;
- return getClass().getCanonicalName().compareTo(
- o.getClass().getCanonicalName());
- }
- public boolean equals(Object o) {
- if (!(o instanceof UpgradeObject)) {
- return false;
- }
- return this.compareTo((UpgradeObject)o) == 0;
- }
- public int hashCode() {
- return new UOSignature(this).hashCode();
- }
- }