org.apache.oozie.coord
Class CoordELEvaluator

java.lang.Object
  org.apache.oozie.coord.CoordELEvaluator

public class CoordELEvaluator
extends java.lang.Object

This class provide different evaluators required at different stages

Field Summary

static java.lang.Integer	HOUR
static java.lang.Integer	MINUTE

Constructor Summary

CoordELEvaluator()

Method Summary

static ELEvaluator	createDataEvaluator(org.jdom.Element eJob, org.apache.hadoop.conf.Configuration conf, java.lang.String actionId) Create an Evaluator to resolve dataIns and dataOuts of an application instance (used in stage 3)
static ELEvaluator	createELEvaluatorForDataEcho(org.apache.hadoop.conf.Configuration conf, java.lang.String group, java.util.HashMap<java.lang.String,java.lang.String> dataNameList)
static ELEvaluator	createELEvaluatorForGroup(org.apache.hadoop.conf.Configuration conf, java.lang.String group) Create an evaluator to be used in resolving configuration vars and frequency constant/functions (used in Stage 1)
static ELEvaluator	createInstancesELEvaluator(org.jdom.Element event, SyncCoordAction appInst, org.apache.hadoop.conf.Configuration conf) Create a new Evaluator to resolve the EL functions and variables using action creation time (Phase 2)
static ELEvaluator	createInstancesELEvaluator(java.lang.String tag, org.jdom.Element event, SyncCoordAction appInst, org.apache.hadoop.conf.Configuration conf)
static ELEvaluator	createLazyEvaluator(java.util.Date actualTime, java.util.Date nominalTime, org.jdom.Element dEvent, org.apache.hadoop.conf.Configuration conf) Create a new evaluator for Lazy resolve (phase 3).
static ELEvaluator	createSLAEvaluator(java.util.Date nominalTime, org.apache.hadoop.conf.Configuration conf) Create a SLA evaluator to be used during Materialization
static ELEvaluator	createURIELEvaluator(java.lang.String strDate) Create a new Evaluator to resolve URI temple with time specific constant

Methods inherited from class java.lang.Object

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

Field Detail

MINUTE

public static final java.lang.Integer MINUTE

HOUR

public static final java.lang.Integer HOUR

Constructor Detail

CoordELEvaluator

public CoordELEvaluator()

Method Detail

createELEvaluatorForGroup

public static ELEvaluator createELEvaluatorForGroup(org.apache.hadoop.conf.Configuration conf,
                                                    java.lang.String group)

Create an evaluator to be used in resolving configuration vars and frequency constant/functions (used in Stage 1)

Parameters:

conf - : Configuration containing property variables

Returns:

configured ELEvaluator

createInstancesELEvaluator

public static ELEvaluator createInstancesELEvaluator(org.jdom.Element event,
                                                     SyncCoordAction appInst,
                                                     org.apache.hadoop.conf.Configuration conf)
                                              throws java.lang.Exception

Create a new Evaluator to resolve the EL functions and variables using action creation time (Phase 2)

Parameters:

event - : Xml element for data-in element usually enclosed by tag

appInst - : Application Instance related information such as Action creation Time

conf - :Configuration to substitute any variables

Returns:

configured ELEvaluator

Throws:

java.lang.Exception - : If there is any date-time string in wrong format, the exception is thrown

createInstancesELEvaluator

public static ELEvaluator createInstancesELEvaluator(java.lang.String tag,
                                                     org.jdom.Element event,
                                                     SyncCoordAction appInst,
                                                     org.apache.hadoop.conf.Configuration conf)
                                              throws java.lang.Exception

Throws:

java.lang.Exception

createELEvaluatorForDataEcho

public static ELEvaluator createELEvaluatorForDataEcho(org.apache.hadoop.conf.Configuration conf,
                                                       java.lang.String group,
                                                       java.util.HashMap<java.lang.String,java.lang.String> dataNameList)
                                                throws java.lang.Exception

Throws:

java.lang.Exception

createLazyEvaluator

public static ELEvaluator createLazyEvaluator(java.util.Date actualTime,
                                              java.util.Date nominalTime,
                                              org.jdom.Element dEvent,
                                              org.apache.hadoop.conf.Configuration conf)
                                       throws java.lang.Exception

Create a new evaluator for Lazy resolve (phase 3). For example, coord_latest(n) and coord_actualTime()function should be resolved when all other data dependencies are met.

Parameters:

actualTime - : Action start time

nominalTime - : Action creation time

dEvent - :XML element for data-in element usually enclosed by tag

conf - :Configuration to substitute any variables

Returns:

configured ELEvaluator

Throws:

java.lang.Exception - : If there is any date-time string in wrong format, the exception is thrown

createSLAEvaluator

public static ELEvaluator createSLAEvaluator(java.util.Date nominalTime,
                                             org.apache.hadoop.conf.Configuration conf)
                                      throws java.lang.Exception

Create a SLA evaluator to be used during Materialization

Parameters:

nominalTime -

conf -

Returns:

Throws:

java.lang.Exception

createDataEvaluator

public static ELEvaluator createDataEvaluator(org.jdom.Element eJob,
                                              org.apache.hadoop.conf.Configuration conf,
                                              java.lang.String actionId)
                                       throws java.lang.Exception

Create an Evaluator to resolve dataIns and dataOuts of an application instance (used in stage 3)

Parameters:

eJob - : XML element for the application instance

conf - :Configuration to substitute any variables

Returns:

configured ELEvaluator

Throws:

java.lang.Exception - : If there is any date-time string in wrong format, the exception is thrown

createURIELEvaluator

public static ELEvaluator createURIELEvaluator(java.lang.String strDate)
                                        throws java.lang.Exception

Create a new Evaluator to resolve URI temple with time specific constant

Parameters:

strDate - : Date-time

Returns:

configured ELEvaluator

Throws:

java.lang.Exception - If there is any date-time string in wrong format, the exception is thrown