org.arrow.runtime.scope.ProcessScope.java Source code

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Here is the source code for org.arrow.runtime.scope.ProcessScope.java

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/*
 * Copyright 2014 Christian Weber
 *
 * 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.arrow.runtime.scope;

import java.util.Map;

import org.springframework.beans.factory.ObjectFactory;
import org.springframework.beans.factory.config.Scope;
import org.springframework.util.Assert;
import org.arrow.runtime.support.EngineSynchronizationManager;

/**
 * Custom {@link Scope} implementation used for process scope bean definitions.
 * 
 * @author christian.weber
 * @since 1.0.0
 */
public class ProcessScope implements Scope {

    public static boolean isSet() {
        return EngineSynchronizationManager.getProcessScope() != null;
    }

    /**
    * {@inheritDoc}
    */
    @Override
    public Object get(String key, ObjectFactory<?> beanFactory) {

        Map<String, Object> map = EngineSynchronizationManager.getProcessScope();
        Assert.notNull(map, "map is null, key: " + key);
        if (map.containsKey(key)) {
            return map.get(key);
        }
        map.put(key, beanFactory.getObject());
        return map.get(key);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public String getConversationId() {
        return "process";
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void registerDestructionCallback(String name, Runnable runnable) {
        // do nothing
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Object remove(String key) {
        Map<String, Object> map = EngineSynchronizationManager.getProcessScope();
        return map.remove(key);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Map<String, Object> resolveContextualObject(String key) {
        if ("process".equals(key)) {
            return EngineSynchronizationManager.getProcessScope();
        }
        return null;
    }

}