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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).
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/*
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * .
 *
 */
package org.apache.http.conn;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.SocketException;

import org.apache.http.HttpEntity;
import org.apache.http.entity.HttpEntityWrapper;
import org.apache.http.util.Args;
import org.apache.http.util.EntityUtils;

/**
 * An entity that releases a {@link ManagedClientConnection connection}.
 * A {@link ManagedClientConnection} will
 * typically not return a managed entity, but you can replace
 * the unmanaged entity in the response with a managed one.
 *
 * @since 4.0
 *
 * @deprecated (4.3) do not use.
 */
@Deprecated
public class BasicManagedEntity extends HttpEntityWrapper
    implements ConnectionReleaseTrigger, EofSensorWatcher {

    /** The connection to release. */
    protected ManagedClientConnection managedConn;

    /** Whether to keep the connection alive. */
    protected final boolean attemptReuse;

    /**
     * Creates a new managed entity that can release a connection.
     *
     * @param entity    the entity of which to wrap the content.
     *                  Note that the argument entity can no longer be used
     *                  afterwards, since the content will be taken by this
     *                  managed entity.
     * @param conn      the connection to release
     * @param reuse     whether the connection should be re-used
     */
    public BasicManagedEntity(final HttpEntity entity,
                              final ManagedClientConnection conn,
                              final boolean reuse) {
        super(entity);
        Args.notNull(conn, "Connection");
        this.managedConn = conn;
        this.attemptReuse = reuse;
    }

    @Override
    public boolean isRepeatable() {
        return false;
    }

    @Override
    public InputStream getContent() throws IOException {
        return new EofSensorInputStream(wrappedEntity.getContent(), this);
    }

    private void ensureConsumed() throws IOException {
        if (managedConn == null) {
            return;
        }

        try {
            if (attemptReuse) {
                // this will not trigger a callback from EofSensorInputStream
                EntityUtils.consume(wrappedEntity);
                managedConn.markReusable();
            } else {
                managedConn.unmarkReusable();
            }
        } finally {
            releaseManagedConnection();
        }
    }

    /**
     * @deprecated (4.1) Use {@link EntityUtils#consume(HttpEntity)}
     */
    @Deprecated
    @Override
    public void consumeContent() throws IOException {
        ensureConsumed();
    }

    @Override
    public void writeTo(final OutputStream outStream) throws IOException {
        super.writeTo(outStream);
        ensureConsumed();
    }

    @Override
    public void releaseConnection() throws IOException {
        ensureConsumed();
    }

    @Override
    public void abortConnection() throws IOException {

        if (managedConn != null) {
            try {
                managedConn.abortConnection();
            } finally {
                managedConn = null;
            }
        }
    }

    @Override
    public boolean eofDetected(final InputStream wrapped) throws IOException {
        try {
            if (managedConn != null) {
                if (attemptReuse) {
                    // there may be some cleanup required, such as
                    // reading trailers after the response body:
                    wrapped.close();
                    managedConn.markReusable();
                } else {
                    managedConn.unmarkReusable();
                }
            }
        } finally {
            releaseManagedConnection();
        }
        return false;
    }

    @Override
    public boolean streamClosed(final InputStream wrapped) throws IOException {
        try {
            if (managedConn != null) {
                if (attemptReuse) {
                    final boolean valid = managedConn.isOpen();
                    // this assumes that closing the stream will
                    // consume the remainder of the response body:
                    try {
                        wrapped.close();
                        managedConn.markReusable();
                    } catch (final SocketException ex) {
                        if (valid) {
                            throw ex;
                        }
                    }
                } else {
                    managedConn.unmarkReusable();
                }
            }
        } finally {
            releaseManagedConnection();
        }
        return false;
    }

    @Override
    public boolean streamAbort(final InputStream wrapped) throws IOException {
        if (managedConn != null) {
            managedConn.abortConnection();
        }
        return false;
    }

    /**
     * Releases the connection gracefully.
     * The connection attribute will be nullified.
     * Subsequent invocations are no-ops.
     *
     * @throws IOException      in case of an IO problem.
     *         The connection attribute will be nullified anyway.
     */
    protected void releaseManagedConnection()
        throws IOException {

        if (managedConn != null) {
            try {
                managedConn.releaseConnection();
            } finally {
                managedConn = null;
            }
        }
    }

}