| /** |
| * 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.impl; |
| |
| import java.util.List; |
| import javax.management.MBeanAttributeInfo; |
| import javax.management.MBeanInfo; |
| |
| import com.google.common.collect.Lists; |
| |
| import org.apache.hadoop.metrics2.AbstractMetric; |
| import org.apache.hadoop.metrics2.MetricsInfo; |
| import org.apache.hadoop.metrics2.MetricsTag; |
| import org.apache.hadoop.metrics2.MetricsVisitor; |
| |
| /** |
| * Helper class to build MBeanInfo from metrics records |
| */ |
| class MBeanInfoBuilder implements MetricsVisitor { |
| |
| private final String name, description; |
| private List<MBeanAttributeInfo> attrs; |
| private Iterable<MetricsRecordImpl> recs; |
| private int curRecNo; |
| |
| MBeanInfoBuilder(String name, String desc) { |
| this.name = name; |
| description = desc; |
| attrs = Lists.newArrayList(); |
| } |
| |
| MBeanInfoBuilder reset(Iterable<MetricsRecordImpl> recs) { |
| this.recs = recs; |
| attrs.clear(); |
| return this; |
| } |
| |
| MBeanAttributeInfo newAttrInfo(String name, String desc, String type) { |
| return new MBeanAttributeInfo(getAttrName(name), type, desc, |
| true, false, false); // read-only, non-is |
| } |
| |
| MBeanAttributeInfo newAttrInfo(MetricsInfo info, String type) { |
| return newAttrInfo(info.name(), info.description(), type); |
| } |
| |
| @Override |
| public void gauge(MetricsInfo info, int value) { |
| attrs.add(newAttrInfo(info, "java.lang.Integer")); |
| } |
| |
| @Override |
| public void gauge(MetricsInfo info, long value) { |
| attrs.add(newAttrInfo(info, "java.lang.Long")); |
| } |
| |
| @Override |
| public void gauge(MetricsInfo info, float value) { |
| attrs.add(newAttrInfo(info, "java.lang.Float")); |
| } |
| |
| @Override |
| public void gauge(MetricsInfo info, double value) { |
| attrs.add(newAttrInfo(info, "java.lang.Double")); |
| } |
| |
| @Override |
| public void counter(MetricsInfo info, int value) { |
| attrs.add(newAttrInfo(info, "java.lang.Integer")); |
| } |
| |
| @Override |
| public void counter(MetricsInfo info, long value) { |
| attrs.add(newAttrInfo(info, "java.lang.Long")); |
| } |
| |
| String getAttrName(String name) { |
| return curRecNo > 0 ? name +"."+ curRecNo : name; |
| } |
| |
| MBeanInfo get() { |
| curRecNo = 0; |
| for (MetricsRecordImpl rec : recs) { |
| for (MetricsTag t : rec.tags()) { |
| attrs.add(newAttrInfo("tag."+ t.name(), t.description(), |
| "java.lang.String")); |
| } |
| for (AbstractMetric m : rec.metrics()) { |
| m.visit(this); |
| } |
| ++curRecNo; |
| } |
| MetricsSystemImpl.LOG.debug(attrs.toString()); |
| MBeanAttributeInfo[] attrsArray = new MBeanAttributeInfo[attrs.size()]; |
| return new MBeanInfo(name, description, attrs.toArray(attrsArray), |
| null, null, null); // no ops/ctors/notifications |
| } |
| } |