hadoop MetricsInfoImpl 源码
haddop MetricsInfoImpl 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/lib/MetricsInfoImpl.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.hadoop.metrics2.lib;
import org.apache.hadoop.thirdparty.com.google.common.base.Objects;
import org.apache.hadoop.metrics2.MetricsInfo;
import java.util.StringJoiner;
import static org.apache.hadoop.util.Preconditions.checkNotNull;
/**
* Making implementing metric info a little easier
*/
class MetricsInfoImpl implements MetricsInfo {
private final String name, description;
MetricsInfoImpl(String name, String description) {
this.name = checkNotNull(name, "name");
this.description = checkNotNull(description, "description");
}
@Override public String name() {
return name;
}
@Override public String description() {
return description;
}
@Override public boolean equals(Object obj) {
if (obj instanceof MetricsInfo) {
MetricsInfo other = (MetricsInfo) obj;
return Objects.equal(name, other.name()) &&
Objects.equal(description, other.description());
}
return false;
}
@Override public int hashCode() {
return Objects.hashCode(name, description);
}
@Override public String toString() {
return new StringJoiner(", ", this.getClass().getSimpleName() + "{", "}")
.add("name=" + name)
.add("description=" + description)
.toString();
}
}
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