org.gridgain.grid.spi.deployment.uri.GridUriDeploymentSpringParser Maven / Gradle / Ivy

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Java-based middleware for in-memory processing of big data in a distributed environment.

There is a newer version: 6.6.9-p1

/* 
 Copyright (C) GridGain Systems. All Rights Reserved.
 
 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.gridgain.grid.spi.deployment.uri;

import org.gridgain.grid.logger.*;
import org.gridgain.grid.spi.*;
import org.gridgain.grid.util.typedef.internal.*;
import org.springframework.beans.*;
import org.springframework.beans.factory.xml.*;
import org.springframework.core.io.*;
import java.io.*;

/**
 * Workaround for {@link InputStreamResource}. Converts input stream with XML
 * to {@code GridUriDeploymentSpringDocument} with {@link ByteArrayResource}
 * instead of {@link InputStreamResource}.
 */
final class GridUriDeploymentSpringParser {
    /**
     * Enforces singleton.
     */
    private GridUriDeploymentSpringParser() {
        // No-op.
    }

    /**
     * Converts given input stream expecting XML inside to
     * {@link GridUriDeploymentSpringDocument}.
     * 
     * This is a workaround for the {@link InputStreamResource} which does
     * not work properly.
     *
     * @param in Input stream with XML.
     * @param log Logger
     * @return Grid wrapper for the input stream.
     * @throws GridSpiException Thrown if incoming input stream could not be
     *      read or parsed by {@code Spring} {@link XmlBeanFactory}.
     * @see XmlBeanFactory
     */
    static GridUriDeploymentSpringDocument parseTasksDocument(InputStream in, GridLogger log) throws
        GridSpiException {
        assert in != null;

        // Note: use ByteArrayResource instead of InputStreamResource because InputStreamResource doesn't work.
        ByteArrayOutputStream out  = new ByteArrayOutputStream();

        try {
            U.copy(in, out);

            XmlBeanFactory factory = new XmlBeanFactory(new ByteArrayResource(out.toByteArray()));

            return new GridUriDeploymentSpringDocument(factory);
        }
        catch (BeansException | IOException e) {
            throw new GridSpiException("Failed to parse spring XML file.", e);
        }
        finally{
            U.close(out, log);
        }
    }
}