org.wallerlab.yoink.service.request.JmsRequestReader.java Source code

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Here is the source code for org.wallerlab.yoink.service.request.JmsRequestReader.java

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/*
 * Copyright 2014-2015 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 org.wallerlab.yoink.service.request;

import java.util.Optional;

import org.springframework.batch.item.ItemReader;
import org.springframework.batch.item.NonTransientResourceException;
import org.springframework.batch.item.ParseException;
import org.springframework.batch.item.UnexpectedInputException;

/**
 * this class is for job request, to get all xml files off JMS
 * 
 *
 */
public class JmsRequestReader implements ItemReader<String> {

    private ItemReader<String> jmsItemReader;

    private boolean jmsResquestReaderServiceRunning = true;

    private Optional<String> item;

    @Override
    public String read() throws Exception, UnexpectedInputException, ParseException, NonTransientResourceException {
        while (jmsResquestReaderServiceRunning) {
            item = Optional.ofNullable(jmsItemReader.read());
            if (!item.isPresent()) {
                Thread.sleep(1000);
            } else
                break;
        }
        return item.get();
    }

    public ItemReader<String> getJmsItemReader() {
        return jmsItemReader;
    }

    public void setJmsItemReader(ItemReader<String> jmsItemReader) {
        this.jmsItemReader = jmsItemReader;
    }

}