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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
*
* This adapter tracks the checkpoints for reusable communication states,
* as indicated by {@link #markReusable markReusable} and queried by
* {@link #isMarkedReusable isMarkedReusable}.
* All send and receive operations will automatically clear the mark.
*
* Connection release calls are delegated to the connection manager,
* if there is one. {@link #abortConnection abortConnection} will
* clear the reusability mark first. The connection manager is
* expected to tolerate multiple calls to the release method.
*
* @since 4.0
*
* @deprecated (4.2) do not use
*/
@Deprecated
public abstract class AbstractClientConnAdapter implements ManagedClientConnection, HttpContext {
/**
* The connection manager.
*/
private final ClientConnectionManager connManager;
/** The wrapped connection. */
private volatile OperatedClientConnection wrappedConnection;
/** The reusability marker. */
private volatile boolean markedReusable;
/** True if the connection has been shut down or released. */
private volatile boolean released;
/** The duration this is valid for while idle (in ms). */
private volatile long duration;
/**
* Creates a new connection adapter.
* The adapter is initially not
* {@link #isMarkedReusable marked} as reusable.
*
* @param mgr the connection manager, or {@code null}
* @param conn the connection to wrap, or {@code null}
*/
protected AbstractClientConnAdapter(final ClientConnectionManager mgr,
final OperatedClientConnection conn) {
super();
connManager = mgr;
wrappedConnection = conn;
markedReusable = false;
released = false;
duration = Long.MAX_VALUE;
}
/**
* Detaches this adapter from the wrapped connection.
* This adapter becomes useless.
*/
protected synchronized void detach() {
wrappedConnection = null;
duration = Long.MAX_VALUE;
}
protected OperatedClientConnection getWrappedConnection() {
return wrappedConnection;
}
protected ClientConnectionManager getManager() {
return connManager;
}
/**
* @deprecated (4.1) use {@link #assertValid(OperatedClientConnection)}
*/
@Deprecated
protected final void assertNotAborted() throws InterruptedIOException {
if (isReleased()) {
throw new InterruptedIOException("Connection has been shut down");
}
}
/**
* @since 4.1
* @return value of released flag
*/
protected boolean isReleased() {
return released;
}
/**
* Asserts that there is a valid wrapped connection to delegate to.
*
* @throws ConnectionShutdownException if there is no wrapped connection
* or connection has been aborted
*/
protected final void assertValid(
final OperatedClientConnection wrappedConn) throws ConnectionShutdownException {
if (isReleased() || wrappedConn == null) {
throw new ConnectionShutdownException();
}
}
@Override
public boolean isOpen() {
final OperatedClientConnection conn = getWrappedConnection();
if (conn == null) {
return false;
}
return conn.isOpen();
}
@Override
public boolean isStale() {
if (isReleased()) {
return true;
}
final OperatedClientConnection conn = getWrappedConnection();
if (conn == null) {
return true;
}
return conn.isStale();
}
@Override
public void setSocketTimeout(final int timeout) {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
conn.setSocketTimeout(timeout);
}
@Override
public int getSocketTimeout() {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
return conn.getSocketTimeout();
}
@Override
public HttpConnectionMetrics getMetrics() {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
return conn.getMetrics();
}
@Override
public void flush() throws IOException {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
conn.flush();
}
@Override
public boolean isResponseAvailable(final int timeout) throws IOException {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
return conn.isResponseAvailable(timeout);
}
@Override
public void receiveResponseEntity(final HttpResponse response)
throws HttpException, IOException {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
unmarkReusable();
conn.receiveResponseEntity(response);
}
@Override
public HttpResponse receiveResponseHeader()
throws HttpException, IOException {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
unmarkReusable();
return conn.receiveResponseHeader();
}
@Override
public void sendRequestEntity(final HttpEntityEnclosingRequest request)
throws HttpException, IOException {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
unmarkReusable();
conn.sendRequestEntity(request);
}
@Override
public void sendRequestHeader(final HttpRequest request)
throws HttpException, IOException {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
unmarkReusable();
conn.sendRequestHeader(request);
}
@Override
public InetAddress getLocalAddress() {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
return conn.getLocalAddress();
}
@Override
public int getLocalPort() {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
return conn.getLocalPort();
}
@Override
public InetAddress getRemoteAddress() {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
return conn.getRemoteAddress();
}
@Override
public int getRemotePort() {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
return conn.getRemotePort();
}
@Override
public boolean isSecure() {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
return conn.isSecure();
}
@Override
public void bind(final Socket socket) throws IOException {
throw new UnsupportedOperationException();
}
@Override
public Socket getSocket() {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
if (!isOpen()) {
return null;
}
return conn.getSocket();
}
@Override
public SSLSession getSSLSession() {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
if (!isOpen()) {
return null;
}
SSLSession result = null;
final Socket sock = conn.getSocket();
if (sock instanceof SSLSocket) {
result = ((SSLSocket)sock).getSession();
}
return result;
}
@Override
public void markReusable() {
markedReusable = true;
}
@Override
public void unmarkReusable() {
markedReusable = false;
}
@Override
public boolean isMarkedReusable() {
return markedReusable;
}
@Override
public void setIdleDuration(final long duration, final TimeUnit unit) {
if(duration > 0) {
this.duration = unit.toMillis(duration);
} else {
this.duration = -1;
}
}
@Override
public synchronized void releaseConnection() {
if (released) {
return;
}
released = true;
connManager.releaseConnection(this, duration, TimeUnit.MILLISECONDS);
}
@Override
public synchronized void abortConnection() {
if (released) {
return;
}
released = true;
unmarkReusable();
try {
shutdown();
} catch (final IOException ignore) {
}
connManager.releaseConnection(this, duration, TimeUnit.MILLISECONDS);
}
@Override
public Object getAttribute(final String id) {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
if (conn instanceof HttpContext) {
return ((HttpContext) conn).getAttribute(id);
} else {
return null;
}
}
@Override
public Object removeAttribute(final String id) {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
if (conn instanceof HttpContext) {
return ((HttpContext) conn).removeAttribute(id);
} else {
return null;
}
}
@Override
public void setAttribute(final String id, final Object obj) {
final OperatedClientConnection conn = getWrappedConnection();
assertValid(conn);
if (conn instanceof HttpContext) {
((HttpContext) conn).setAttribute(id, obj);
}
}
}