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/*
 * $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//httpclient/src/java/org/apache/commons/httpclient/params/HttpConnectionParams.java,v 1.6 2004/09/15 20:32:21 olegk Exp $
 * $Revision: 1182263 $
 * $Date: 2011-10-12 04:39:33 -0400 (Wed, 12 Oct 2011) $
 *
 * ====================================================================
 *
 *  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
 * .
 *
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package org.apache.commons.httpclient.params;

/**
 * This class represents a collection of HTTP protocol parameters applicable to 
 * {@link org.apache.commons.httpclient.HttpConnection HTTP connections}. 
 * Protocol parameters may be linked together to form a hierarchy. If a particular 
 * parameter value has not been explicitly defined in the collection itself, its 
 * value will be drawn from the parent collection of parameters.
 * 
 * @author Oleg Kalnichevski
 * 
 * @version $Revision: 1182263 $
 * 
 * @since 3.0
 */
public class HttpConnectionParams extends DefaultHttpParams {

    /**
     * Defines the default socket timeout (SO_TIMEOUT) in milliseconds which is the 
     * timeout for waiting for data. A timeout value of zero is interpreted as an infinite 
     * timeout. This value is used when no socket timeout is set in the 
     * {@link HttpMethodParams HTTP method parameters}. 
     * 

* This parameter expects a value of type {@link Integer}. *

* @see java.net.SocketOptions#SO_TIMEOUT */ public static final String SO_TIMEOUT = "http.socket.timeout"; /** * Determines whether Nagle's algorithm is to be used. The Nagle's algorithm * tries to conserve bandwidth by minimizing the number of segments that are * sent. When applications wish to decrease network latency and increase * performance, they can disable Nagle's algorithm (that is enable TCP_NODELAY). * Data will be sent earlier, at the cost of an increase in bandwidth consumption. *

* This parameter expects a value of type {@link Boolean}. *

* @see java.net.SocketOptions#TCP_NODELAY */ public static final String TCP_NODELAY = "http.tcp.nodelay"; /** * Determines a hint the size of the underlying buffers used by the platform * for outgoing network I/O. This value is a suggestion to the kernel from * the application about the size of buffers to use for the data to be sent * over the socket. *

* This parameter expects a value of type {@link Integer}. *

* @see java.net.SocketOptions#SO_SNDBUF */ public static final String SO_SNDBUF = "http.socket.sendbuffer"; /** * Determines a hint the size of the underlying buffers used by the platform * for incoming network I/O. This value is a suggestion to the kernel from * the application about the size of buffers to use for the data to be received * over the socket. *

* This parameter expects a value of type {@link Integer}. *

* @see java.net.SocketOptions#SO_RCVBUF */ public static final String SO_RCVBUF = "http.socket.receivebuffer"; /** * Sets SO_LINGER with the specified linger time in seconds. The maximum timeout * value is platform specific. Value 0 implies that the option is disabled. * Value -1 implies that the JRE default is used. The setting only affects * socket close. *

* This parameter expects a value of type {@link Integer}. *

* @see java.net.SocketOptions#SO_LINGER */ public static final String SO_LINGER = "http.socket.linger"; /** * Determines the timeout until a connection is etablished. A value of zero * means the timeout is not used. The default value is zero. *

* This parameter expects a value of type {@link Integer}. *

*/ public static final String CONNECTION_TIMEOUT = "http.connection.timeout"; /** * Determines whether stale connection check is to be used. Disabling * stale connection check may result in slight performance improvement * at the risk of getting an I/O error when executing a request over a * connection that has been closed at the server side. *

* This parameter expects a value of type {@link Boolean}. *

*/ public static final String STALE_CONNECTION_CHECK = "http.connection.stalecheck"; /** * Determines the maximum line length limit. If set to a positive value, * any HTTP line exceeding this limit will cause an IOException. A negative * or zero value will effectively disable the check. *

* This parameter expects a value of type {@link Integer}. *

*/ public static final String MAX_LINE_LENGTH = "http.connection.max-line-length"; /** * Determines the maximum HTTP header count allowed. If set to a positive * value, the number of HTTP headers received from the data stream exceeding * this limit will cause an IOException. A negative or zero value will * effectively disable the check. *

* This parameter expects a value of type {@link Integer}. *

*/ public static final String MAX_HEADER_COUNT = "http.connection.max-header-count"; /** * Creates a new collection of parameters with the collection returned * by {@link #getDefaultParams()} as a parent. The collection will defer * to its parent for a default value if a particular parameter is not * explicitly set in the collection itself. * * @see #getDefaultParams() */ public HttpConnectionParams() { super(); } /** * Returns the default socket timeout (SO_TIMEOUT) in milliseconds which is the * timeout for waiting for data. A timeout value of zero is interpreted as an infinite * timeout. This value is used when no socket timeout is set in the * {@link HttpMethodParams HTTP method parameters}. * * @return timeout in milliseconds */ public int getSoTimeout() { return getIntParameter(SO_TIMEOUT, 0); } /** * Sets the default socket timeout (SO_TIMEOUT) in milliseconds which is the * timeout for waiting for data. A timeout value of zero is interpreted as an infinite * timeout. This value is used when no socket timeout is set in the * {@link HttpMethodParams HTTP method parameters}. * * @param timeout Timeout in milliseconds */ public void setSoTimeout(int timeout) { setIntParameter(SO_TIMEOUT, timeout); } /** * Determines whether Nagle's algorithm is to be used. The Nagle's algorithm * tries to conserve bandwidth by minimizing the number of segments that are * sent. When applications wish to decrease network latency and increase * performance, they can disable Nagle's algorithm (that is enable TCP_NODELAY). * Data will be sent earlier, at the cost of an increase in bandwidth consumption. * * @param value true if the Nagle's algorithm is to NOT be used * (that is enable TCP_NODELAY), false otherwise. */ public void setTcpNoDelay(boolean value) { setBooleanParameter(TCP_NODELAY, value); } /** * Tests if Nagle's algorithm is to be used. * * @return true if the Nagle's algorithm is to NOT be used * (that is enable TCP_NODELAY), false otherwise. */ public boolean getTcpNoDelay() { return getBooleanParameter(TCP_NODELAY, true); } /** * Returns a hint the size of the underlying buffers used by the platform for * outgoing network I/O. This value is a suggestion to the kernel from the * application about the size of buffers to use for the data to be sent over * the socket. * * @return the hint size of the send buffer */ public int getSendBufferSize() { return getIntParameter(SO_SNDBUF, -1); } /** * Sets a hint the size of the underlying buffers used by the platform for * outgoing network I/O. This value is a suggestion to the kernel from the * application about the size of buffers to use for the data to be sent over * the socket. * * @param size the hint size of the send buffer */ public void setSendBufferSize(int size) { setIntParameter(SO_SNDBUF, size); } /** * Returns a hint the size of the underlying buffers used by the platform * for incoming network I/O. This value is a suggestion to the kernel from * the application about the size of buffers to use for the data to be received * over the socket. * * @return the hint size of the send buffer */ public int getReceiveBufferSize() { return getIntParameter(SO_RCVBUF, -1); } /** * Sets a hint the size of the underlying buffers used by the platform * for incoming network I/O. This value is a suggestion to the kernel from * the application about the size of buffers to use for the data to be received * over the socket. * * @param size the hint size of the send buffer */ public void setReceiveBufferSize(int size) { setIntParameter(SO_RCVBUF, size); } /** * Returns linger-on-close timeout. Value 0 implies that the option is * disabled. Value -1 implies that the JRE default is used. * * @return the linger-on-close timeout */ public int getLinger() { return getIntParameter(SO_LINGER, -1); } /** * Returns linger-on-close timeout. This option disables/enables immediate return * from a close() of a TCP Socket. Enabling this option with a non-zero Integer * timeout means that a close() will block pending the transmission and * acknowledgement of all data written to the peer, at which point the socket is * closed gracefully. Value 0 implies that the option is * disabled. Value -1 implies that the JRE default is used. * * @param value the linger-on-close timeout */ public void setLinger(int value) { setIntParameter(SO_LINGER, value); } /** * Returns the timeout until a connection is etablished. A value of zero * means the timeout is not used. The default value is zero. * * @return timeout in milliseconds. */ public int getConnectionTimeout() { return getIntParameter(CONNECTION_TIMEOUT, 0); } /** * Sets the timeout until a connection is etablished. A value of zero * means the timeout is not used. The default value is zero. * * @param timeout Timeout in milliseconds. */ public void setConnectionTimeout(int timeout) { setIntParameter(CONNECTION_TIMEOUT, timeout); } /** * Tests whether stale connection check is to be used. Disabling * stale connection check may result in slight performance improvement * at the risk of getting an I/O error when executing a request over a * connection that has been closed at the server side. * * @return true if stale connection check is to be used, * false otherwise. */ public boolean isStaleCheckingEnabled() { return getBooleanParameter(STALE_CONNECTION_CHECK, true); } /** * Defines whether stale connection check is to be used. Disabling * stale connection check may result in slight performance improvement * at the risk of getting an I/O error when executing a request over a * connection that has been closed at the server side. * * @param value true if stale connection check is to be used, * false otherwise. */ public void setStaleCheckingEnabled(boolean value) { setBooleanParameter(STALE_CONNECTION_CHECK, value); } }




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