org.gridgain.grid.cache.jta.jndi.GridCacheJndiTmLookup Maven / Gradle / Ivy

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/* 
 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.
 */

/*  _________        _____ __________________        _____
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 *  _  / __  __  ___/__  / _  __  / _  / __  _  __ `/__  / __  __ \
 *  / /_/ /  _  /    _  /  / /_/ /  / /_/ /  / /_/ / _  /  _  / / /
 *  \____/   /_/     /_/   \_,__/   \____/   \__,_/  /_/   /_/ /_/
 */

package org.gridgain.grid.cache.jta.jndi;

import org.gridgain.grid.*;
import org.gridgain.grid.cache.jta.*;
import org.jetbrains.annotations.*;

import javax.naming.*;
import javax.transaction.*;
import java.util.*;

/**
 * Implementation of {@link GridCacheTmLookup} interface that is using list of JNDI names to find TM.
 */
public class GridCacheJndiTmLookup implements GridCacheTmLookup {
    /** */
    private List jndiNames;

    /**
     * Gets a list of JNDI names.
     * 
     * @return List of JNDI names that is used to find TM.
     */
    public List getJndiNames() {
        return jndiNames;
    }

    /**
     * Sets a list of JNDI names used by this TM.
     * 
     * @param jndiNames List of JNDI names that is used to find TM.
     */
    public void setJndiNames(List jndiNames) {
        this.jndiNames = jndiNames;
    }

    /** {@inheritDoc} */
    @Nullable @Override public TransactionManager getTm() throws GridException {
        assert jndiNames != null;
        assert !jndiNames.isEmpty();

        try {
            InitialContext ctx = new InitialContext();

            for (String s : jndiNames) {
                Object obj = ctx.lookup(s);

                if (obj != null && obj instanceof TransactionManager) {
                    return (TransactionManager) obj;
                }
            }
        }
        catch (NamingException e) {
            throw new GridException("Unable to lookup TM by: " + jndiNames, e);
        }

        return null;
    }
}