## org.apache.http.impl.conn
Class AbstractClientConnAdapter

    java.lang.Object
      org.apache.http.impl.conn.AbstractClientConnAdapter

All Implemented Interfaces:
  ConnectionReleaseTrigger, HttpRoutedConnection, ManagedClientConnection, HttpClientConnection, HttpConnection, HttpInetConnection, HttpContext

Direct Known Subclasses:
  AbstractPooledConnAdapter

    public abstract class AbstractClientConnAdapter

extends Object
implements ManagedClientConnection, HttpContext

Abstract adapter from `operated` to `managed` client connections. Read and write methods are delegated to the wrapped connection. Operations affecting the connection state have to be implemented by derived classes. Operations for querying the connection state are delegated to the wrapped connection if there is one, or return a default value if there is none.

This adapter tracks the checkpoints for reusable communication states, as indicated by `markReusable` and queried by `isMarkedReusable`. All send and receive operations will automatically clear the mark.

Connection release calls are delegated to the connection manager, if there is one. `abortConnection` will clear the reusability mark first. The connection manager is expected to tolerate multiple calls to the release method.

Since:
  4.0

Field Summary

Fields inherited from interface org.apache.http.protocol.HttpContext
`RESERVED_PREFIX`

Constructor Summary
`protected` `AbstractClientConnAdapter(ClientConnectionManager mgr, OperatedClientConnection conn)` Creates a new connection adapter.

Method Summary
`void` `abortConnection()` Releases the connection without the option of keep-alive.
`protected void` `assertNotAborted()` Deprecated. use `assertValid(OperatedClientConnection)`
`protected void` `assertValid(OperatedClientConnection wrappedConn)` Asserts that there is a valid wrapped connection to delegate to.
`protected void` `detach()` Detaches this adapter from the wrapped connection.
`void` `flush()`
`Object` `getAttribute(String id)`
`InetAddress` `getLocalAddress()`
`int` `getLocalPort()`
`protected ClientConnectionManager` `getManager()`
`HttpConnectionMetrics` `getMetrics()`
`InetAddress` `getRemoteAddress()`
`int` `getRemotePort()`
`int` `getSocketTimeout()`
`SSLSession` `getSSLSession()` Obtains the SSL session of the underlying connection, if any.
`protected OperatedClientConnection` `getWrappedConnection()`
`boolean` `isMarkedReusable()` Indicates whether this connection is in a reusable communication state.
`boolean` `isOpen()`
`protected boolean` `isReleased()`
`boolean` `isResponseAvailable(int timeout)`
`boolean` `isSecure()` Indicates whether this connection is secure.
`boolean` `isStale()`
`void` `markReusable()` Marks this connection as being in a reusable communication state.
`void` `receiveResponseEntity(HttpResponse response)`
`HttpResponse` `receiveResponseHeader()`
`void` `releaseConnection()` Releases the connection with the option of keep-alive.
`Object` `removeAttribute(String id)`
`void` `sendRequestEntity(HttpEntityEnclosingRequest request)`
`void` `sendRequestHeader(HttpRequest request)`
`void` `setAttribute(String id, Object obj)`
`void` `setIdleDuration(long duration, TimeUnit unit)` Sets the duration that this connection can remain idle before it is reused.
`void` `setSocketTimeout(int timeout)`
`void` `unmarkReusable()` Marks this connection as not being in a reusable state.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Methods inherited from interface org.apache.http.conn.ManagedClientConnection
`getRoute, getState, layerProtocol, open, setState, tunnelProxy, tunnelTarget`

Constructor Detail

### AbstractClientConnAdapter

    protected AbstractClientConnAdapter(ClientConnectionManager mgr,
                                        OperatedClientConnection conn)

  Creates a new connection adapter. The adapter is initially not `marked` as reusable.

  Parameters:
    `mgr` - the connection manager, or `null`
    `conn` - the connection to wrap, or `null`

Method Detail

### detach

    protected void detach()

  Detaches this adapter from the wrapped connection. This adapter becomes useless.

### getWrappedConnection

    protected OperatedClientConnection getWrappedConnection()

### getManager

    protected ClientConnectionManager getManager()

### assertNotAborted

    @Deprecated
    protected final void assertNotAborted()
                                   throws InterruptedIOException

  Deprecated. use `assertValid(OperatedClientConnection)`

  Throws:
    `InterruptedIOException`

### isReleased

    protected boolean isReleased()

  Returns:
    value of released flag
  Since:
    4.1

### assertValid

    protected final void assertValid(OperatedClientConnection wrappedConn)
                              throws ConnectionShutdownException

  Asserts that there is a valid wrapped connection to delegate to.

  Throws:
    `ConnectionShutdownException` - if there is no wrapped connection or connection has been aborted

### isOpen

    public boolean isOpen()

  Specified by:
    `isOpen` in interface `HttpConnection`

### isStale

    public boolean isStale()

  Specified by:
    `isStale` in interface `HttpConnection`

### setSocketTimeout

    public void setSocketTimeout(int timeout)

  Specified by:
    `setSocketTimeout` in interface `HttpConnection`

### getSocketTimeout

    public int getSocketTimeout()

  Specified by:
    `getSocketTimeout` in interface `HttpConnection`

### getMetrics

    public HttpConnectionMetrics getMetrics()

  Specified by:
    `getMetrics` in interface `HttpConnection`

### flush

    public void flush()
               throws IOException

  Specified by:
    `flush` in interface `HttpClientConnection`
  Throws:
    `IOException`

### isResponseAvailable

    public boolean isResponseAvailable(int timeout)
                                throws IOException

  Specified by:
    `isResponseAvailable` in interface `HttpClientConnection`
  Throws:
    `IOException`

### receiveResponseEntity

    public void receiveResponseEntity(HttpResponse response)
                               throws HttpException,
                                      IOException

  Specified by:
    `receiveResponseEntity` in interface `HttpClientConnection`
  Throws:
    `HttpException`
    `IOException`

### receiveResponseHeader

    public HttpResponse receiveResponseHeader()
                                       throws HttpException,
                                              IOException

  Specified by:
    `receiveResponseHeader` in interface `HttpClientConnection`
  Throws:
    `HttpException`
    `IOException`

### sendRequestEntity

    public void sendRequestEntity(HttpEntityEnclosingRequest request)
                           throws HttpException,
                                  IOException

  Specified by:
    `sendRequestEntity` in interface `HttpClientConnection`
  Throws:
    `HttpException`
    `IOException`

### sendRequestHeader

    public void sendRequestHeader(HttpRequest request)
                           throws HttpException,
                                  IOException

  Specified by:
    `sendRequestHeader` in interface `HttpClientConnection`
  Throws:
    `HttpException`
    `IOException`

### getLocalAddress

    public InetAddress getLocalAddress()

  Specified by:
    `getLocalAddress` in interface `HttpInetConnection`

### getLocalPort

    public int getLocalPort()

  Specified by:
    `getLocalPort` in interface `HttpInetConnection`

### getRemoteAddress

    public InetAddress getRemoteAddress()

  Specified by:
    `getRemoteAddress` in interface `HttpInetConnection`

### getRemotePort

    public int getRemotePort()

  Specified by:
    `getRemotePort` in interface `HttpInetConnection`

### isSecure

    public boolean isSecure()

  Description copied from interface: `HttpRoutedConnection`
  Indicates whether this connection is secure. The return value is well-defined only while the connection is open. It may change even while the connection is open.

  Specified by:
    `isSecure` in interface `HttpRoutedConnection`
  Specified by:
    `isSecure` in interface `ManagedClientConnection`
  Returns:
    `true` if this connection is secure, `false` otherwise

### getSSLSession

    public SSLSession getSSLSession()

  Description copied from interface: `HttpRoutedConnection`
  Obtains the SSL session of the underlying connection, if any. If this connection is open, and the underlying socket is an `SSLSocket`, the SSL session of that socket is obtained. This is a potentially blocking operation.
  Note: Whether the underlying socket is an SSL socket can not necessarily be determined via `HttpRoutedConnection.isSecure()`. Plain sockets may be considered secure, for example if they are connected to a known host in the same network segment. On the other hand, SSL sockets may be considered insecure, for example depending on the chosen cipher suite.

  Specified by:
    `getSSLSession` in interface `HttpRoutedConnection`
  Specified by:
    `getSSLSession` in interface `ManagedClientConnection`
  Returns:
    the underlying SSL session if available, `null` otherwise

### markReusable

    public void markReusable()

  Description copied from interface: `ManagedClientConnection`
  Marks this connection as being in a reusable communication state. The checkpoints for reuseable communication states (in the absence of pipelining) are before sending a request and after receiving the response in its entirety. The connection will automatically clear the checkpoint when used for communication. A call to this method indicates that the next checkpoint has been reached.
  A reusable communication state is necessary but not sufficient for the connection to be reused. A `route` mismatch, the connection being closed, or other circumstances might prevent reuse.

  Specified by:
    `markReusable` in interface `ManagedClientConnection`

### unmarkReusable

    public void unmarkReusable()

  Description copied from interface: `ManagedClientConnection`
  Marks this connection as not being in a reusable state. This can be used immediately before releasing this connection to prevent its reuse. Reasons for preventing reuse include error conditions and the evaluation of a `reuse strategy`.
  Note: It is not necessary to call here before writing to or reading from this connection. Communication attempts will automatically unmark the state as non-reusable. It can then be switched back using `markReusable`.

  Specified by:
    `unmarkReusable` in interface `ManagedClientConnection`

### isMarkedReusable

    public boolean isMarkedReusable()

  Description copied from interface: `ManagedClientConnection`
  Indicates whether this connection is in a reusable communication state. See `markReusable` and `unmarkReusable` for details.

  Specified by:
    `isMarkedReusable` in interface `ManagedClientConnection`
  Returns:
    `true` if this connection is marked as being in a reusable communication state, `false` otherwise

### setIdleDuration

    public void setIdleDuration(long duration,
                                TimeUnit unit)

  Description copied from interface: `ManagedClientConnection`
  Sets the duration that this connection can remain idle before it is reused. The connection should not be used again if this time elapses. The idle duration must be reset after each request sent over this connection. The elapsed time starts counting when the connection is released, which is typically after the headers (and any response body, if present) is fully consumed.

  Specified by:
    `setIdleDuration` in interface `ManagedClientConnection`

### releaseConnection

    public void releaseConnection()

  Description copied from interface: `ConnectionReleaseTrigger`
  Releases the connection with the option of keep-alive. This is a "graceful" release and may cause IO operations for consuming the remainder of a response entity. Use `abortConnection` for a hard release. The connection may be reused as specified by the duration.

  Specified by:
    `releaseConnection` in interface `ConnectionReleaseTrigger`

### abortConnection

    public void abortConnection()

  Description copied from interface: `ConnectionReleaseTrigger`
  Releases the connection without the option of keep-alive. This is a "hard" release that implies a shutdown of the connection. Use `ConnectionReleaseTrigger.releaseConnection()` for a graceful release.

  Specified by:
    `abortConnection` in interface `ConnectionReleaseTrigger`

### getAttribute

    public Object getAttribute(String id)

  Specified by:
    `getAttribute` in interface `HttpContext`

### removeAttribute

    public Object removeAttribute(String id)

  Specified by:
    `removeAttribute` in interface `HttpContext`

### setAttribute

    public void setAttribute(String id,
                             Object obj)

  Specified by:
    `setAttribute` in interface `HttpContext`

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