org.apache.lucene.replicator.http

## Class HttpClientBase

- java.lang.Object
- - org.apache.lucene.replicator.http.HttpClientBase

- All Implemented Interfaces:
    Closeable, AutoCloseable
  Direct Known Subclasses:
    HttpReplicator

      public abstract class HttpClientBase
      extends Object
      implements Closeable

  Base class for Http clients.
  WARNING: This API is experimental and might change in incompatible ways in the next release.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static int` | `DEFAULT_CONNECTION_TIMEOUT` Default connection timeout for this client, in milliseconds.
    `static int` | `DEFAULT_SO_TIMEOUT` Default socket timeout for this client, in milliseconds.
    `protected String` | `url` The URL stting to execute requests against.

  - ### Constructor Summary

    Constructors
    Modifier | Constructor and Description
    --- | ---
    `protected` | `HttpClientBase(String host, int port, String path, org.apache.http.conn.HttpClientConnectionManager conMgr, org.apache.http.client.config.RequestConfig defaultConfig)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `close()`
    `protected <T> T` | `doAction(org.apache.http.HttpResponse response, boolean consume, Callable<T> call)` Do a specific action and validate after the action that the status is still OK, and if not, attempt to extract the actual server side exception.
    `protected <T> T` | `doAction(org.apache.http.HttpResponse response, Callable<T> call)` Same as `doAction(HttpResponse, boolean, Callable)` but always do consume at the end.
    `protected void` | `ensureOpen()` Throws `AlreadyClosedException` if this client is already closed.
    `protected org.apache.http.HttpResponse` | `executeGET(String request, String... params)` internal: execute a request and return its result The `params` argument is treated as: name1,value1,name2,value2,...
    `protected org.apache.http.HttpResponse` | `executePOST(String request, org.apache.http.HttpEntity entity, String... params)` internal: execute a request and return its result The `params` argument is treated as: name1,value1,name2,value2,...
    `protected boolean` | `isClosed()` Returns true iff this instance was `closed`, otherwise returns false.
    `InputStream` | `responseInputStream(org.apache.http.HttpResponse response)` Internal utility: input stream of the provided response
    `InputStream` | `responseInputStream(org.apache.http.HttpResponse response, boolean consume)` Internal utility: input stream of the provided response, which optionally consumes the response's resources when the input stream is exhausted.
    `protected void` | `throwKnownError(org.apache.http.HttpResponse response, org.apache.http.StatusLine statusLine)`
    `protected void` | `verifyStatus(org.apache.http.HttpResponse response)` Internal: response status after invocation, and in case or error attempt to read the exception sent by the server.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### DEFAULT_CONNECTION_TIMEOUT

          public static final int DEFAULT_CONNECTION_TIMEOUT

      Default connection timeout for this client, in milliseconds.
      See Also:
        Constant Field Values

    - #### DEFAULT_SO_TIMEOUT

          public static final int DEFAULT_SO_TIMEOUT

      Default socket timeout for this client, in milliseconds.
      See Also:
        Constant Field Values

    - #### url

          protected final String url

      The URL stting to execute requests against.

  - ### Constructor Detail

    - #### HttpClientBase

          protected HttpClientBase(String host,
                                   int port,
                                   String path,
                                   org.apache.http.conn.HttpClientConnectionManager conMgr,
                                   org.apache.http.client.config.RequestConfig defaultConfig)

      Parameters:
        `conMgr` - connection manager to use for this http client. NOTE:The provided `HttpClientConnectionManager` will not be `HttpClientConnectionManager.shutdown()` by this class.
        `defaultConfig` - the default `RequestConfig` to set on the client. If `null` a default config is created w/ the default connection and socket timeouts.

  - ### Method Detail

    - #### ensureOpen

          protected final void ensureOpen()
                                   throws AlreadyClosedException

      Throws `AlreadyClosedException` if this client is already closed.
      Throws:
        `AlreadyClosedException`

    - #### verifyStatus

          protected void verifyStatus(org.apache.http.HttpResponse response)
                               throws IOException

      Internal: response status after invocation, and in case or error attempt to read the exception sent by the server.
      Throws:
        `IOException`

    - #### throwKnownError

          protected void throwKnownError(org.apache.http.HttpResponse response,
                                         org.apache.http.StatusLine statusLine)
                                  throws IOException

      Throws:
        `IOException`

    - #### executePOST

          protected org.apache.http.HttpResponse executePOST(String request,
                                                             org.apache.http.HttpEntity entity,
                                                             String... params)
                                                      throws IOException

      internal: execute a request and return its result The `params` argument is treated as: name1,value1,name2,value2,...
      Throws:
        `IOException`

    - #### executeGET

          protected org.apache.http.HttpResponse executeGET(String request,
                                                            String... params)
                                                     throws IOException

      internal: execute a request and return its result The `params` argument is treated as: name1,value1,name2,value2,...
      Throws:
        `IOException`

    - #### responseInputStream

          public InputStream responseInputStream(org.apache.http.HttpResponse response)
                                          throws IOException

      Internal utility: input stream of the provided response
      Throws:
        `IOException`

    - #### responseInputStream

          public InputStream responseInputStream(org.apache.http.HttpResponse response,
                                                 boolean consume)
                                          throws IOException

      Internal utility: input stream of the provided response, which optionally consumes the response's resources when the input stream is exhausted.
      Throws:
        `IOException`

    - #### isClosed

          protected final boolean isClosed()

      Returns true iff this instance was `closed`, otherwise returns false. Note that if you override `close()`, you must call `super.close()`, in order for this instance to be properly closed.

    - #### doAction

          protected <T> T doAction(org.apache.http.HttpResponse response,
                                   Callable<T> call)
                            throws IOException

      Same as `doAction(HttpResponse, boolean, Callable)` but always do consume at the end.
      Throws:
        `IOException`

    - #### doAction

          protected <T> T doAction(org.apache.http.HttpResponse response,
                                   boolean consume,
                                   Callable<T> call)
                            throws IOException

      Do a specific action and validate after the action that the status is still OK, and if not, attempt to extract the actual server side exception. Optionally release the response at exit, depending on `consume` parameter.
      Throws:
        `IOException`

    - #### close

          public void close()
                     throws IOException

      Specified by:
        `close` in interface `Closeable`
      Specified by:
        `close` in interface `AutoCloseable`
      Throws:
        `IOException`

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