de.codecentric.batch.metrics.item.MetricsTestItemReader.java Source code

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Here is the source code for de.codecentric.batch.metrics.item.MetricsTestItemReader.java

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/*
 * Copyright 2014 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 de.codecentric.batch.metrics.item;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.batch.item.ExecutionContext;
import org.springframework.batch.item.ItemStreamException;
import org.springframework.batch.item.ItemStreamReader;
import org.springframework.batch.item.NonTransientResourceException;
import org.springframework.batch.item.ParseException;
import org.springframework.batch.item.UnexpectedInputException;

import de.codecentric.batch.metrics.Action;
import de.codecentric.batch.metrics.BatchMetrics;
import de.codecentric.batch.metrics.Item;
import de.codecentric.batch.metrics.MetricNames;
import de.codecentric.batch.metrics.MetricsTestException;

/**
 * @author Tobias Flohre
 */
public class MetricsTestItemReader implements ItemStreamReader<Item> {

    private static final Log log = LogFactory.getLog(MetricsTestItemReader.class);

    private ItemStreamReader<Item> delegate;
    private BatchMetrics businessMetrics;
    private boolean readerTransactional;

    public MetricsTestItemReader(ItemStreamReader<Item> delegate, BatchMetrics businessMetrics,
            boolean readerTransactional) {
        this.delegate = delegate;
        this.businessMetrics = businessMetrics;
        this.readerTransactional = readerTransactional;
    }

    @Override
    public Item read() throws Exception, UnexpectedInputException, ParseException, NonTransientResourceException {
        if (readerTransactional) {
            businessMetrics.increment(MetricNames.READ_COUNT.getName());
            businessMetrics.submit(MetricNames.READ_GAUGE.getName(), 5);
        } else {
            businessMetrics.incrementNonTransactional(MetricNames.READ_COUNT.getName());
            businessMetrics.submitNonTransactional(MetricNames.READ_GAUGE.getName(), 5);
        }
        Item item = delegate.read();
        if (item != null && item.getActions().contains(Action.FAIL_ON_READ)) {
            throw new MetricsTestException(Action.FAIL_ON_READ);
        }
        log.debug("Read item: " + item);
        return item;
    }

    @Override
    public void open(ExecutionContext executionContext) throws ItemStreamException {
        businessMetrics.increment(MetricNames.STREAM_OPEN_COUNT.getName());
        businessMetrics.submit(MetricNames.STREAM_OPEN_GAUGE.getName(), 5);
        delegate.open(executionContext);
    }

    @Override
    public void update(ExecutionContext executionContext) throws ItemStreamException {
        businessMetrics.increment(MetricNames.STREAM_UPDATE_COUNT.getName());
        businessMetrics.submit(MetricNames.STREAM_UPDATE_GAUGE.getName(), 5);
        delegate.update(executionContext);
    }

    @Override
    public void close() throws ItemStreamException {
        // close is called after step processing, after StepExecutionListener execution,
        // that's why we don't see these counters in the log.
        businessMetrics.increment(MetricNames.STREAM_CLOSE_COUNT.getName());
        businessMetrics.submit(MetricNames.STREAM_CLOSE_GAUGE.getName(), 5);
        delegate.close();
    }

}