org.apache.oozie.service
Class WorkflowAppService

java.lang.Object
  org.apache.oozie.service.WorkflowAppService

All Implemented Interfaces:

Service

Direct Known Subclasses:

LiteWorkflowAppService

public abstract class WorkflowAppService
extends Object
implements Service

Service that provides application workflow definition reading from the path and creation of the proto configuration.

Field Summary

static String	APP_LIB_PATH_LIST
static String	CONF_PREFIX
static String	CONFG_MAX_WF_LENGTH
static String	HADOOP_USER
static String	OOZIE_SUBWORKFLOW_CLASSPATH_INHERITANCE
static String	OOZIE_WF_SUBWORKFLOW_CLASSPATH_INHERITANCE
static String	SYSTEM_LIB_PATH

Fields inherited from interface org.apache.oozie.service.Service

DEFAULT_LOCK_TIMEOUT, lockTimeout, USE_XCOMMAND

Constructor Summary

WorkflowAppService()

Method Summary

XConfiguration	createProtoActionConf(org.apache.hadoop.conf.Configuration jobConf, boolean isWorkflowJob) Create proto configuration.
void	destroy() Destroy the workflow application service.
Class<? extends Service>	getInterface() Return the public interface for workflow application service.
org.apache.hadoop.fs.Path	getSystemLibPath() Returns Oozie system libpath.
void	init(Services services) Initialize the workflow application service.
abstract WorkflowApp	parseDef(org.apache.hadoop.conf.Configuration jobConf) Parse workflow definition.
abstract WorkflowApp	parseDef(String wfXml, org.apache.hadoop.conf.Configuration jobConf) Parse workflow definition.
protected String	readDefinition(String appPath, String user, org.apache.hadoop.conf.Configuration conf) Read workflow definition.

Methods inherited from class java.lang.Object

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

Field Detail

CONF_PREFIX

public static final String CONF_PREFIX

See Also:

Constant Field Values

SYSTEM_LIB_PATH

public static final String SYSTEM_LIB_PATH

See Also:

Constant Field Values

APP_LIB_PATH_LIST

public static final String APP_LIB_PATH_LIST

See Also:

Constant Field Values

HADOOP_USER

public static final String HADOOP_USER

See Also:

Constant Field Values

CONFG_MAX_WF_LENGTH

public static final String CONFG_MAX_WF_LENGTH

See Also:

Constant Field Values

OOZIE_SUBWORKFLOW_CLASSPATH_INHERITANCE

public static final String OOZIE_SUBWORKFLOW_CLASSPATH_INHERITANCE

See Also:

Constant Field Values

OOZIE_WF_SUBWORKFLOW_CLASSPATH_INHERITANCE

public static final String OOZIE_WF_SUBWORKFLOW_CLASSPATH_INHERITANCE

See Also:

Constant Field Values

Constructor Detail

WorkflowAppService

public WorkflowAppService()

Method Detail

init

public void init(Services services)

Initialize the workflow application service.

Specified by:

init in interface Service

Parameters:

services - services instance.

destroy

public void destroy()

Destroy the workflow application service.

Specified by:

destroy in interface Service

getInterface

public Class<? extends Service> getInterface()

Return the public interface for workflow application service.

Specified by:

getInterface in interface Service

Returns:

WorkflowAppService.

readDefinition

protected String readDefinition(String appPath,
                                String user,
                                org.apache.hadoop.conf.Configuration conf)
                         throws WorkflowException

Read workflow definition.

Parameters:

appPath - application path.

user - user name.

Returns:

workflow definition.

Throws:

WorkflowException - thrown if the definition could not be read.

createProtoActionConf

public XConfiguration createProtoActionConf(org.apache.hadoop.conf.Configuration jobConf,
                                            boolean isWorkflowJob)
                                     throws WorkflowException

Create proto configuration.

The proto configuration includes the user,group and the paths which need to be added to distributed cache. These paths include .jar,.so and the resource file paths.

Parameters:

jobConf - job configuration.

isWorkflowJob - indicates if the job is a workflow job or not.

Returns:

proto configuration.

Throws:

WorkflowException - thrown if the proto action configuration could not be created.

parseDef

public abstract WorkflowApp parseDef(org.apache.hadoop.conf.Configuration jobConf)
                              throws WorkflowException

Parse workflow definition.

Parameters:

jobConf - job configuration.

Returns:

workflow application.

Throws:

WorkflowException - thrown if the workflow application could not be parsed.

parseDef

public abstract WorkflowApp parseDef(String wfXml,
                                     org.apache.hadoop.conf.Configuration jobConf)
                              throws WorkflowException

Parse workflow definition.

Parameters:

wfXml - workflow.

jobConf - job configuration

Returns:

workflow application.

Throws:

WorkflowException - thrown if the workflow application could not be parsed.

getSystemLibPath

public org.apache.hadoop.fs.Path getSystemLibPath()

Returns Oozie system libpath.

Returns:

Oozie system libpath (sharelib) in HDFS if present, otherwise it returns NULL.