org.pentaho.di.www

类 AllocateServerSocketServlet

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

org.pentaho.di.www.BaseHttpServlet

org.pentaho.di.www.AllocateServerSocketServlet

所有已实现的接口:

Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig, CartePluginInterface, CarteServletInterface

public class AllocateServerSocketServlet
extends BaseHttpServlet
implements CartePluginInterface

This servlet allows a client (TransSplitter in our case) to ask for a port number.
This port number will be allocated in such a way that the port number is unique for a given hostname.
This in turn will ensure that all the slaves will use valid port numbers, even if multiple slaves run on the same host.

作者:

matt

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
static String	CONTEXT_PATH
static String	PARAM_HOSTNAME
static String	PARAM_ID
static String	PARAM_RANGE_START
static String	PARAM_SOURCE_SLAVE
static String	PARAM_SOURCE_STEPCOPY
static String	PARAM_SOURCE_STEPNAME
static String	PARAM_TARGET_SLAVE
static String	PARAM_TARGET_STEPCOPY
static String	PARAM_TARGET_STEPNAME
static String	PARAM_TRANSFORMATION_NAME
static String	XML_TAG_PORT

从类继承的字段 org.pentaho.di.www.BaseHttpServlet

detections, jobMap, log, socketRepository, transformationMap

构造器概要

构造器

构造器和说明
AllocateServerSocketServlet()
AllocateServerSocketServlet(TransformationMap transformationMap)

方法概要

限定符和类型	方法和说明
void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) /kettle/allocateSocket GET Allocates port to use by client.
String	getContextPath()
String	getService()
String	toString()

从类继承的方法 org.pentaho.di.www.BaseHttpServlet

convertContextPath, doDelete, doPost, doPut, getDetections, getJobMap, getSocketRepository, getTransformationMap, isJettyMode, logBasic, logBasic, logDebug, logDetailed, logDetailed, logError, logError, logError, logMinimal, logRowlevel, setJettyMode, setup

从类继承的方法 javax.servlet.http.HttpServlet

doHead, doOptions, doTrace, getLastModified, service, service

从类继承的方法 javax.servlet.GenericServlet

destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, init, log, log

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.pentaho.di.www.CartePluginInterface

isJettyMode, setJettyMode, setup

字段详细资料

CONTEXT_PATH

public static final String CONTEXT_PATH

另请参阅:

常量字段值

PARAM_RANGE_START

public static final String PARAM_RANGE_START

另请参阅:

常量字段值

PARAM_HOSTNAME

public static final String PARAM_HOSTNAME

另请参阅:

常量字段值

PARAM_ID

public static final String PARAM_ID

另请参阅:

常量字段值

PARAM_TRANSFORMATION_NAME

public static final String PARAM_TRANSFORMATION_NAME

另请参阅:

常量字段值

PARAM_SOURCE_SLAVE

public static final String PARAM_SOURCE_SLAVE

另请参阅:

常量字段值

PARAM_SOURCE_STEPNAME

public static final String PARAM_SOURCE_STEPNAME

另请参阅:

常量字段值

PARAM_SOURCE_STEPCOPY

public static final String PARAM_SOURCE_STEPCOPY

另请参阅:

常量字段值

PARAM_TARGET_SLAVE

public static final String PARAM_TARGET_SLAVE

另请参阅:

常量字段值

PARAM_TARGET_STEPNAME

public static final String PARAM_TARGET_STEPNAME

另请参阅:

常量字段值

PARAM_TARGET_STEPCOPY

public static final String PARAM_TARGET_STEPCOPY

另请参阅:

常量字段值

XML_TAG_PORT

public static final String XML_TAG_PORT

另请参阅:

常量字段值

构造器详细资料

AllocateServerSocketServlet

public AllocateServerSocketServlet()

AllocateServerSocketServlet

public AllocateServerSocketServlet(TransformationMap transformationMap)

方法详细资料

doGet

public void doGet(javax.servlet.http.HttpServletRequest request,
                  javax.servlet.http.HttpServletResponse response)
           throws javax.servlet.ServletException,
                  IOException

/kettle/allocateSocket

GET

Allocates port to use by client. Allows any client to ask for a port number to use. This is necessary several slaves can be run on the same host. The method ensures the port number is unique for host name provided and makes sure the slaves are using valid port numbers. Data communication across a cluster of Carte servers happens through TCP/IP sockets. Slave transformations sometimes open (or listen to) tens to hundreds of sockets. When you want to allocate the port numbers for data communication between slave transformation in a kettle clustering run, you need unique combinations of all the parameters below. port number will be returned in the Response object. If an error occurred you'll receive html output describing the problem. HTTP status code of such response is 500.

Example Request:

    GET /kettle/allocateSocket/?xml=Y&rangeStart=100&host=locahost&id=clust&trans=my_trans&sourceSlave=slave_1
  &sourceStep=200&sourceCopy=1&targetSlave=slave_2&targetStep=50&targetCopy=1
    

Parameters

name	description	type
xml	Boolean flag set to either Y or N describing if xml or html reply should be produced.	boolean, optional
rangeStart	Port number to start looking from.	integer
host	Port's host.	query
id	Carte container id.	query
trans	Running transformation id.	query
sourceSlave	Name of the source slave server.	query
sourceStep	Port number step used on source slave server.	integer
sourceCopy	Number of copies of the step on source server.	integer
targetSlave	Name of the target slave server.	query
targetStep	Port number step used on target slave server.	integer
targetCopy	Number of copies of the step on target server.	integer

Response Body

element:	(custom)
media types:	text/xml, text/html

Response wraps port number that was allocated or error stack trace if an error occurred. Response HTTP code is 200 if there were no errors. Otherwise it is 500.

Example Response:

    
    100
    

Status Codes

code	description
200	Request was processed and XML response is returned.
500	Internal server error occurs during request processing. This might also be caused by missing request parameter.

指定者:

doGet 在接口中 CartePluginInterface

覆盖:

doGet 在类中 javax.servlet.http.HttpServlet

抛出:

javax.servlet.ServletException

IOException

toString

public String toString()

覆盖:

toString 在类中 Object

getService

public String getService()

指定者:

getService 在接口中 CarteServletInterface

getContextPath

public String getContextPath()

指定者:

getContextPath 在接口中 CartePluginInterface