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/**
 * Copyright (c) 2008-2012 EBM WebSourcing, 2012-2016 Linagora
 * 
 * This program/library is free software: you can redistribute it and/or modify
 * it under the terms of the New BSD License (3-clause license).
 *
 * This program/library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the New BSD License (3-clause license)
 * for more details.
 *
 * You should have received a copy of the New BSD License (3-clause license)
 * along with this program/library; If not, see http://directory.fsf.org/wiki/License:BSD_3Clause/
 * for the New BSD License (3-clause license).
 */
 
package org.ow2.easywsdl.extensions.wsdl4complexwsdl;

import org.ow2.easywsdl.extensions.wsdl4complexwsdl.api.WSDL4ComplexWsdlException;
import org.ow2.easywsdl.extensions.wsdl4complexwsdl.api.WSDL4ComplexWsdlReader;

import com.ebmwebsourcing.easycommons.pooling.GenericResourcePool;
import com.ebmwebsourcing.easycommons.pooling.PoolException;
import com.ebmwebsourcing.easycommons.pooling.PoolPolicy;
import com.ebmwebsourcing.easycommons.pooling.ResourceHandler;

/**
 * This class represent a {@link WSDL4ComplexWsdlReader} pool, which provides {@link WSDL4ComplexWsdlReader}
 * objects as resources.
 * 
 * @author Nicolas Oddoux - EBM WebSourcing
 */
public class WSDL4ComplexWsdlReaderResourcePool {

    /**
     * {@link WSDL4ComplexWsdlReader} resource handler to manage {@link WSDL4ComplexWsdlReader} life cycle methods
     */
    private static class WSDL4ComplexWsdlReaderResourceHandler implements ResourceHandler {

        final WSDL4ComplexWsdlFactory wsdl4ComplexWsdlFactory;

        public WSDL4ComplexWsdlReaderResourceHandler() {
            try {
                this.wsdl4ComplexWsdlFactory = WSDL4ComplexWsdlFactory.newInstance();
            } catch (WSDL4ComplexWsdlException e) {
                throw new PoolException(e);
            }
        }

        @Override
        public WSDL4ComplexWsdlReader create() {
            try {
                return this.wsdl4ComplexWsdlFactory.newWSDLReader();
            } catch (WSDL4ComplexWsdlException e) {
                throw new PoolException(e);
            }
        }

        @Override
        public void onRelease(WSDL4ComplexWsdlReader wsdl4ComplexWsdlReader) {
        }

        @Override
        public void onTake(WSDL4ComplexWsdlReader wsdl4ComplexWsdlReader) {            
        }
    }
    
    private final GenericResourcePool wsdl4ComplexWsdlReaderResourcePool;

    /**
     * Allowing to instantiate a new {@link WSDL4ComplexWsdlReaderResourcePool} containing {@link WSDL4ComplexWsdlReader} resources.
     * 
     * @param minPoolSize
     *            The minimum number of {@link WSDL4ComplexWsdlReader} instances in the pool (created at the
     *            initialization).
     * @param maxPoolSize
     *            the maximum number of {@link WSDL4ComplexWsdlReader} instances in the current pool (limit of the
     *            pool). It must be greater or equals to the specified minSize.
     *            The maximum value is Integer.MAX_VALUE
     * @param poolPolicy
     *            the {@link PoolPolicy} to adopt when the maximum size is reached. it
     *            must not be null.
     */
    public WSDL4ComplexWsdlReaderResourcePool(int minPoolSize, int maxPoolSize,
            PoolPolicy poolPolicy) {
        WSDL4ComplexWsdlReaderResourceHandler wsdl4ComplexWsdlReaderResourceHandler = new WSDL4ComplexWsdlReaderResourceHandler();
        this.wsdl4ComplexWsdlReaderResourcePool = new GenericResourcePool(
                wsdl4ComplexWsdlReaderResourceHandler, minPoolSize, maxPoolSize, poolPolicy);
    }

    /**
     * Take one unused {@link WSDL4ComplexWsdlReader} in the current pool. After getting a
     * {@link WSDL4ComplexWsdlReader} from the pool and before returning a
     * {@link WSDL4ComplexWsdlReader}, the method onTake() of the {@link WSDL4ComplexWsdlReader}
     * resource handler is called.
     * 
     * @return one {@link WSDL4ComplexWsdlReader}
     * 
     * @throws PoolException
     *             if the current thread is interrupted for the pool policy WAIT
     *             or if there is no more available resource in the pool for the
     *             pool policy REJECT
     * 
     */
    public WSDL4ComplexWsdlReader take() {
        return this.wsdl4ComplexWsdlReaderResourcePool.take();
    }

    /**
     * Release the specified {@link WSDL4ComplexWsdlReader} After putting back the
     * {@link WSDL4ComplexWsdlReader} in the pool, the method onRelease() of the
     * {@link WSDL4ComplexWsdlReader} resource handler is called.
     * 
     * @param wsdl4ComplexWsdlReader
     *            The {@link WSDL4ComplexWsdlReader} to release
     */
    public final void release(final WSDL4ComplexWsdlReader wsdl4ComplexWsdlReader) {
        this.wsdl4ComplexWsdlReaderResourcePool.release(wsdl4ComplexWsdlReader);
    }
}