kr.okplace.job.launch.DefaultJobLoader.java Source code

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Here is the source code for kr.okplace.job.launch.DefaultJobLoader.java

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/*
 * Copyright 2006-2007 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 kr.okplace.job.launch;

import java.util.HashMap;
import java.util.Map;

import org.springframework.batch.core.Job;
import org.springframework.batch.core.configuration.ListableJobLocator;
import org.springframework.batch.core.launch.NoSuchJobException;
import org.springframework.beans.BeanWrapperImpl;
import org.springframework.beans.BeansException;
import org.springframework.beans.PropertyAccessorUtils;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.util.Assert;

public class DefaultJobLoader implements JobLoader, ApplicationContextAware {

    private ListableJobLocator registry;

    private ApplicationContext applicationContext;

    private Map<String, String> configurations = new HashMap<String, String>();

    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;
    }

    public void setRegistry(ListableJobLocator registry) {
        this.registry = registry;
    }

    public Map<String, String> getConfigurations() {
        Map<String, String> result = new HashMap<String, String>(configurations);
        for (String jobName : registry.getJobNames()) {
            try {
                Job configuration = registry.getJob(jobName);
                String name = configuration.getName();
                if (!configurations.containsKey(name)) {
                    result.put(name, "<unknown path>: " + configuration);
                }
            } catch (NoSuchJobException e) {
                throw new IllegalStateException("Registry could not locate its own job (NoSuchJobException).");
            }
        }
        return result;
    }

    public void loadResource(String path) {

        @SuppressWarnings("resource")
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] { path },
                applicationContext);
        String[] names = context.getBeanNamesForType(Job.class);
        for (String name : names) {
            configurations.put(name, path);
        }
    }

    public Object getJobConfiguration(String name) {
        try {
            return registry.getJob(name);
        } catch (NoSuchJobException e) {
            return null;
        }
    }

    public Object getProperty(String path) {
        int index = PropertyAccessorUtils.getFirstNestedPropertySeparatorIndex(path);
        BeanWrapperImpl wrapper = createBeanWrapper(path, index);
        String key = path.substring(index + 1);
        return wrapper.getPropertyValue(key);
    }

    public void setProperty(String path, String value) {
        int index = PropertyAccessorUtils.getFirstNestedPropertySeparatorIndex(path);
        BeanWrapperImpl wrapper = createBeanWrapper(path, index);
        String key = path.substring(index + 1);
        wrapper.setPropertyValue(key, value);
    }

    private BeanWrapperImpl createBeanWrapper(String path, int index) {
        Assert.state(index > 0, "Path must be nested, e.g. bean.value");
        String name = path.substring(0, index);
        Object bean = getJobConfiguration(name);
        Assert.notNull(bean, "No JobConfiguration exists with name=" + name);
        return new BeanWrapperImpl(bean);
    }

}