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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
* <http://www.apache.org/>.
*
*/
package ch.boye.httpclientandroidlib.conn;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.SocketException;
import ch.boye.httpclientandroidlib.HttpEntity;
import ch.boye.httpclientandroidlib.annotation.NotThreadSafe;
import ch.boye.httpclientandroidlib.entity.HttpEntityWrapper;
import ch.boye.httpclientandroidlib.util.Args;
import ch.boye.httpclientandroidlib.util.EntityUtils;
/**
* An entity that releases a {@link ManagedClientConnection connection}.
* A {@link ManagedClientConnection} will
* typically <i>not</i> 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
@NotThreadSafe
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();
}
public void releaseConnection() throws IOException {
ensureConsumed();
}
public void abortConnection() throws IOException {
if (managedConn != null) {
try {
managedConn.abortConnection();
} finally {
managedConn = null;
}
}
}
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;
}
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;
}
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;
}
}
}
}
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