| /* |
| * 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.nifi.controller; |
| |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| public class StandardCounter implements Counter { |
| |
| private final String identifier; |
| private final String context; |
| private final String name; |
| private final AtomicLong value; |
| |
| public StandardCounter(final String identifier, final String context, final String name) { |
| this.identifier = identifier; |
| this.context = context; |
| this.name = name; |
| this.value = new AtomicLong(0L); |
| } |
| |
| @Override |
| public void adjust(final long delta) { |
| this.value.addAndGet(delta); |
| } |
| |
| @Override |
| public String getName() { |
| return name; |
| } |
| |
| @Override |
| public long getValue() { |
| return this.value.get(); |
| } |
| |
| @Override |
| public String getContext() { |
| return context; |
| } |
| |
| @Override |
| public String getIdentifier() { |
| return identifier; |
| } |
| |
| @Override |
| public void reset() { |
| this.value.set(0); |
| } |
| |
| @Override |
| public String toString() { |
| return "Counter[identifier=" + identifier + ']'; |
| } |
| |
| public static UnmodifiableCounter unmodifiableCounter(final Counter counter) { |
| return new UnmodifiableCounter(counter); |
| } |
| |
| static class UnmodifiableCounter extends StandardCounter { |
| |
| private final Counter counter; |
| |
| public UnmodifiableCounter(final Counter counter) { |
| super(counter.getIdentifier(), counter.getContext(), counter.getName()); |
| this.counter = counter; |
| } |
| |
| @Override |
| public void adjust(long delta) { |
| throw new UnsupportedOperationException("Cannot modify value of UnmodifiableCounter"); |
| } |
| |
| @Override |
| public String getName() { |
| return counter.getName(); |
| } |
| |
| @Override |
| public long getValue() { |
| return counter.getValue(); |
| } |
| |
| @Override |
| public String getContext() { |
| return counter.getContext(); |
| } |
| |
| @Override |
| public String getIdentifier() { |
| return counter.getIdentifier(); |
| } |
| |
| @Override |
| public String toString() { |
| return counter.toString(); |
| } |
| } |
| } |