com.acme.PayloadValueCounterHandler.java Source code

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Here is the source code for com.acme.PayloadValueCounterHandler.java

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/*
 * Copyright 2015 the original author or authors.
 *
 * Licensed 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 com.acme;

import org.springframework.integration.annotation.ServiceActivator;
import org.springframework.messaging.Message;
import org.springframework.util.Assert;
import org.springframework.xd.analytics.metrics.core.FieldValueCounterRepository;

/**
 * @author Marius Bogoevici
 */
public class PayloadValueCounterHandler {

    private String name;

    private FieldValueCounterRepository fieldValueCounterRepository;

    public PayloadValueCounterHandler(FieldValueCounterRepository fieldValueCounterRepository, String name) {
        Assert.hasText(name, "must have a name");
        Assert.notNull(fieldValueCounterRepository, "cannot be null");
        this.name = name;
        this.fieldValueCounterRepository = fieldValueCounterRepository;
    }

    @ServiceActivator
    public void handleMessage(Message<?> message) throws Exception {
        if (message.getPayload() != null) {
            fieldValueCounterRepository.increment(name, message.getPayload().toString());
        }
    }
}