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104 lines
3.6 KiB
Java
104 lines
3.6 KiB
Java
/*
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* ====================================================================
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*
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*/
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package ch.boye.httpclientandroidlib;
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import java.io.IOException;
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/**
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* A generic HTTP connection, useful on client and server side.
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*
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* @since 4.0
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*/
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public interface HttpConnection {
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/**
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* Closes this connection gracefully.
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* This method will attempt to flush the internal output
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* buffer prior to closing the underlying socket.
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* This method MUST NOT be called from a different thread to force
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* shutdown of the connection. Use {@link #shutdown shutdown} instead.
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*/
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public void close() throws IOException;
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/**
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* Checks if this connection is open.
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* @return true if it is open, false if it is closed.
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*/
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public boolean isOpen();
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/**
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* Checks whether this connection has gone down.
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* Network connections may get closed during some time of inactivity
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* for several reasons. The next time a read is attempted on such a
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* connection it will throw an IOException.
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* This method tries to alleviate this inconvenience by trying to
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* find out if a connection is still usable. Implementations may do
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* that by attempting a read with a very small timeout. Thus this
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* method may block for a small amount of time before returning a result.
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* It is therefore an <i>expensive</i> operation.
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*
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* @return <code>true</code> if attempts to use this connection are
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* likely to succeed, or <code>false</code> if they are likely
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* to fail and this connection should be closed
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*/
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public boolean isStale();
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/**
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* Sets the socket timeout value.
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*
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* @param timeout timeout value in milliseconds
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*/
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void setSocketTimeout(int timeout);
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/**
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* Returns the socket timeout value.
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*
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* @return positive value in milliseconds if a timeout is set,
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* <code>0</code> if timeout is disabled or <code>-1</code> if
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* timeout is undefined.
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*/
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int getSocketTimeout();
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/**
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* Force-closes this connection.
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* This is the only method of a connection which may be called
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* from a different thread to terminate the connection.
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* This method will not attempt to flush the transmitter's
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* internal buffer prior to closing the underlying socket.
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*/
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public void shutdown() throws IOException;
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/**
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* Returns a collection of connection metrics.
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*
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* @return HttpConnectionMetrics
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*/
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HttpConnectionMetrics getMetrics();
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}
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