com.smartgwt.client.util.workflow

Class ServiceTask

java.lang.Object

com.smartgwt.client.core.BaseClass

com.smartgwt.client.util.workflow.ProcessElement

com.smartgwt.client.util.workflow.Task

com.smartgwt.client.util.workflow.ServiceTask

All Implemented Interfaces:

com.google.gwt.event.shared.HasHandlers

Direct Known Subclasses:

DSAddTask, DSFetchTask, DSRemoveTask, DSUpdateTask

public class ServiceTask
extends Task

A ServiceTask is an element of a Process which calls a DataSource operation, optionally using part of the process state as inputs or storing outputs in the process state. A special "export" operationType is supported to perform a server export based on criteria.

By default a ServiceTask takes the data indicated by inputField and/or inputFieldList as detailed in TaskIO and uses the inputRecord as DSRequest.data. This means the input data becomes Criteria for "fetch" and "export" operations, new record values for an "add" operation, etc. For simplicity, if no inputFieldList is provided and inputField specifies an object, inputData is used as dsRequest.data.

Alternatively, you can set criteria for a "fetch" and "export" operations, or values for other operationTypes. In both cases, you have the ability to use simple expressions like $input.fieldName to take portions of the input data and use it as part of the criteria or values.

OutputData and outputFieldList work as filters. You should determine which properties should be fetched into the process state. If you want to load all data without defining every property manually you can pass a name started with '$' and fetched record or records will be placed as a record or an array of records by the name without this specific symbol.

For example if you specify 'id' and 'name' in outputFieldList, only these properties will be fetched in the process state. If you pass '$orderHeader' in outputField a whole record will be stored in process state under the 'orderHeader' key.

Field Summary

Fields inherited from class com.smartgwt.client.core.BaseClass

config, configOnly, factoryCreated, factoryProperties, id, scClassName

Constructor Summary

Constructors

Constructor and Description
ServiceTask()
ServiceTask(com.google.gwt.core.client.JavaScriptObject jsObj)

Method Summary

Modifier and Type	Method and Description
com.google.gwt.core.client.JavaScriptObject	create()
Criteria	getCriteria() Criteria (including AdvancedCriteria) to use for "fetch" and "export" operations.
DataSource	getDataSource() DataSource ID or DataSource instance to be used.
ExportFormat	getExportFormat() The format in which the data should be exported.
java.lang.String	getFailureElement() ID of the next sequence or element to proceed to if a failure condition arises from DataSource operation.
Criteria	getFixedCriteria() Criteria to be submitted as part of the DSRequest, regardless of inputs to the task.
Record	getFixedValues() Values to be submitted as part of the DSRequest, regardless of inputs to the task.
java.lang.String	getOperationId() The operationId to invoke.
DSOperationType	getOperationType() Type of operation to invoke.
static ServiceTask	getOrCreateRef(com.google.gwt.core.client.JavaScriptObject jsObj)
java.lang.String	getOutputField() Field in the process state where this task writes outputs.
java.lang.String[]	getOutputFieldList() List of multiple fields in the process state where this task will write outputs.
java.lang.Boolean	getPassThruOutput() Does this processElement pass through output from the last executed task (i.e.
Record	getValues() Values to be submitted for "update", "add" and "remove" operations.
ServiceTask	setCriteria(Criteria criteria) Criteria (including AdvancedCriteria) to use for "fetch" and "export" operations.
void	setDataSource(DataSource dataSource) DataSource ID or DataSource instance to be used.
void	setDataSource(java.lang.String dataSource) DataSource ID or DataSource instance to be used.
ServiceTask	setExportFormat(ExportFormat exportFormat) The format in which the data should be exported.
ServiceTask	setFailureElement(java.lang.String failureElement) ID of the next sequence or element to proceed to if a failure condition arises from DataSource operation.
ServiceTask	setFixedCriteria(Criteria fixedCriteria) Criteria to be submitted as part of the DSRequest, regardless of inputs to the task.
ServiceTask	setFixedValues(Record fixedValues) Values to be submitted as part of the DSRequest, regardless of inputs to the task.
ServiceTask	setOperationId(java.lang.String operationId) The operationId to invoke.
ServiceTask	setOperationType(DSOperationType operationType) Type of operation to invoke.
ServiceTask	setOutputField(java.lang.String outputField) Field in the process state where this task writes outputs.
ServiceTask	setOutputFieldList(java.lang.String... outputFieldList) List of multiple fields in the process state where this task will write outputs.
ServiceTask	setPassThruOutput(java.lang.Boolean passThruOutput) Does this processElement pass through output from the last executed task (i.e.
ServiceTask	setValues(Record values) Values to be submitted for "update", "add" and "remove" operations.

Methods inherited from class com.smartgwt.client.util.workflow.Task

getInputField, getInputFieldList, getOutputExpression, setInputField, setInputFieldList, setOutputExpression

Methods inherited from class com.smartgwt.client.util.workflow.ProcessElement

convertToJavaScriptArray, getClassDescription, getDescription, getEditorType, getElementDescription, getID, getJsObj, getNextElement, getOrCreateJsObj, getProcessElements, getTitle, isCreated, onInit, setAttribute, setClassDescription, setDescription, setEditorType, setID, setJavaScriptObject, setNextElement, setTitle

Methods inherited from class com.smartgwt.client.core.BaseClass

addDynamicProperty, addDynamicProperty, addDynamicProperty, applyFactoryProperties, asSGWTComponent, clearDynamicProperty, createJsObj, destroy, doAddHandler, doInit, error, error, errorIfNotCreated, fireEvent, getAttribute, getAttributeAsBoolean, getAttributeAsDate, getAttributeAsDouble, getAttributeAsElement, getAttributeAsFloat, getAttributeAsInt, getAttributeAsJavaScriptObject, getAttributeAsMap, getAttributeAsString, getAttributeAsStringArray, getClassName, getConfig, getHandlerCount, getRef, getRuleScope, getScClassName, getTestInstance, hasAutoAssignedID, hasDynamicProperty, internalSetID, internalSetID, isConfigOnly, isFactoryCreated, onBind, registerID, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setConfig, setConfigOnly, setFactoryCreated, setProperty, setProperty, setProperty, setProperty, setRuleScope, setScClassName

Methods inherited from class java.lang.Object

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

Constructor Detail

ServiceTask

public ServiceTask()

ServiceTask

public ServiceTask(com.google.gwt.core.client.JavaScriptObject jsObj)

Method Detail

getOrCreateRef

public static ServiceTask getOrCreateRef(com.google.gwt.core.client.JavaScriptObject jsObj)

create

public com.google.gwt.core.client.JavaScriptObject create()

Overrides:

create in class Task

setCriteria

public ServiceTask setCriteria(Criteria criteria)
                        throws java.lang.IllegalStateException

Criteria (including AdvancedCriteria) to use for "fetch" and "export" operations.

Data values in this criteria prefixed with "$" will be treated as dynamic expressions which can access the inputs to this task as $input - see TaskInputExpression. Specifically, this means that for simple criteria, any property value that is a String and is prefixed with "$" will be assumed to be an expression, and for AdvancedCriteria, the same treatment will be applied to Criterion.value.

If any data value should not be treated as dynamic (for example, a "$" should be taken as literal), you can place it in fixedCriteria instead.

Ignored for any operationType other than "fetch" and "export". Update or delete operations should place the primary key to update in values.

This property supports DynamicCriteria - use Criterion.valuePath to refer to values in the Process.ruleScope.

Parameters:

criteria - New criteria value. Default value is null

Returns:

ServiceTask instance, for chaining setter calls

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

See Also:

TaskIO overview and related methods

getCriteria

public Criteria getCriteria()

Criteria (including AdvancedCriteria) to use for "fetch" and "export" operations.

Data values in this criteria prefixed with "$" will be treated as dynamic expressions which can access the inputs to this task as $input - see TaskInputExpression. Specifically, this means that for simple criteria, any property value that is a String and is prefixed with "$" will be assumed to be an expression, and for AdvancedCriteria, the same treatment will be applied to Criterion.value.

If any data value should not be treated as dynamic (for example, a "$" should be taken as literal), you can place it in fixedCriteria instead.

Ignored for any operationType other than "fetch" and "export". Update or delete operations should place the primary key to update in values.

This property supports DynamicCriteria - use Criterion.valuePath to refer to values in the Process.ruleScope.

Returns:

Current criteria value. Default value is null

See Also:

TaskIO overview and related methods

setExportFormat

public ServiceTask setExportFormat(ExportFormat exportFormat)
                            throws java.lang.IllegalStateException

The format in which the data should be exported. See ExportFormat for more information.

Parameters:

exportFormat - New exportFormat value. Default value is "csv"

Returns:

ServiceTask instance, for chaining setter calls

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

getExportFormat

public ExportFormat getExportFormat()

The format in which the data should be exported. See ExportFormat for more information.

Returns:

Current exportFormat value. Default value is "csv"

setFailureElement

public ServiceTask setFailureElement(java.lang.String failureElement)
                              throws java.lang.IllegalStateException

ID of the next sequence or element to proceed to if a failure condition arises from DataSource operation.

Parameters:

failureElement - New failureElement value. Default value is null

Returns:

ServiceTask instance, for chaining setter calls

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

getFailureElement

public java.lang.String getFailureElement()

ID of the next sequence or element to proceed to if a failure condition arises from DataSource operation.

Returns:

Current failureElement value. Default value is null

setFixedCriteria

public ServiceTask setFixedCriteria(Criteria fixedCriteria)
                             throws java.lang.IllegalStateException

Criteria to be submitted as part of the DSRequest, regardless of inputs to the task. Will be combined with the data from the Task.inputField or with criteria if specified, via DataSource.combineCriteria().

Parameters:

fixedCriteria - New fixedCriteria value. Default value is null

Returns:

ServiceTask instance, for chaining setter calls

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

getFixedCriteria

public Criteria getFixedCriteria()

Criteria to be submitted as part of the DSRequest, regardless of inputs to the task. Will be combined with the data from the Task.inputField or with criteria if specified, via DataSource.combineCriteria().

Returns:

Current fixedCriteria value. Default value is null

setFixedValues

public ServiceTask setFixedValues(Record fixedValues)
                           throws java.lang.IllegalStateException

Values to be submitted as part of the DSRequest, regardless of inputs to the task. Will be combined with the data from the Task.inputField or with values if specified, via simple copying of fields, with fixedValues overwriting values provided by the inputField, but explicitly specified values overriding fixedValues.

Parameters:

fixedValues - New fixedValues value. Default value is null

Returns:

ServiceTask instance, for chaining setter calls

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

getFixedValues

public Record getFixedValues()

Values to be submitted as part of the DSRequest, regardless of inputs to the task. Will be combined with the data from the Task.inputField or with values if specified, via simple copying of fields, with fixedValues overwriting values provided by the inputField, but explicitly specified values overriding fixedValues.

Returns:

Current fixedValues value. Default value is null

setOperationId

public ServiceTask setOperationId(java.lang.String operationId)
                           throws java.lang.IllegalStateException

The operationId to invoke.

Parameters:

operationId - New operationId value. Default value is null

Returns:

ServiceTask instance, for chaining setter calls

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

getOperationId

public java.lang.String getOperationId()

The operationId to invoke.

Returns:

Current operationId value. Default value is null

setOperationType

public ServiceTask setOperationType(DSOperationType operationType)
                             throws java.lang.IllegalStateException

Type of operation to invoke. A special "export" operation type is supported to perform a server export based on criteria.

Parameters:

operationType - New operationType value. Default value is "fetch"

Returns:

ServiceTask instance, for chaining setter calls

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

getOperationType

public DSOperationType getOperationType()

Type of operation to invoke. A special "export" operation type is supported to perform a server export based on criteria.

Returns:

Current operationType value. Default value is "fetch"

setOutputField

public ServiceTask setOutputField(java.lang.String outputField)
                           throws java.lang.IllegalStateException

Field in the process state where this task writes outputs. See TaskIO.

See outputFieldList for a shorthand method to save the full operation response data.

Overrides:

setOutputField in class Task

Parameters:

outputField - New outputField value. Default value is null

Returns:

ServiceTask instance, for chaining setter calls

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

See Also:

TaskIO overview and related methods

getOutputField

public java.lang.String getOutputField()

Field in the process state where this task writes outputs. See TaskIO.

See outputFieldList for a shorthand method to save the full operation response data.

Overrides:

getOutputField in class Task

Returns:

Current outputField value. Default value is null

See Also:

TaskIO overview and related methods

setOutputFieldList

public ServiceTask setOutputFieldList(java.lang.String... outputFieldList)
                               throws java.lang.IllegalStateException

List of multiple fields in the process state where this task will write outputs. See TaskIO.

If outputField is also specified, it will be implicitly added to the outputFieldList if it is not already present.

In addition to pulling individual fields from the task operation result and placing them into the process state the full response data can also be written into the process state without specifying individual fields. Prefix a destination field path with a "$" (ex. $orderHeader) causes the entire dsResponse.data to be saved.

Overrides:

setOutputFieldList in class Task

Parameters:

outputFieldList - New outputFieldList value. Default value is null

Returns:

ServiceTask instance, for chaining setter calls

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

See Also:

TaskIO overview and related methods

getOutputFieldList

public java.lang.String[] getOutputFieldList()

List of multiple fields in the process state where this task will write outputs. See TaskIO.

If outputField is also specified, it will be implicitly added to the outputFieldList if it is not already present.

In addition to pulling individual fields from the task operation result and placing them into the process state the full response data can also be written into the process state without specifying individual fields. Prefix a destination field path with a "$" (ex. $orderHeader) causes the entire dsResponse.data to be saved.

Overrides:

getOutputFieldList in class Task

Returns:

Current outputFieldList value. Default value is null

See Also:

TaskIO overview and related methods

setPassThruOutput

public ServiceTask setPassThruOutput(java.lang.Boolean passThruOutput)
                              throws java.lang.IllegalStateException

Does this processElement pass through output from the last executed task (i.e. transient state)? See taskInputExpressions for details on the transient state.

Overrides:

setPassThruOutput in class ProcessElement

Parameters:

passThruOutput - New passThruOutput value. Default value is false

Returns:

ServiceTask instance, for chaining setter calls

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

getPassThruOutput

public java.lang.Boolean getPassThruOutput()

Does this processElement pass through output from the last executed task (i.e. transient state)? See taskInputExpressions for details on the transient state.

Overrides:

getPassThruOutput in class ProcessElement

Returns:

Current passThruOutput value. Default value is false

setValues

public ServiceTask setValues(Record values)
                      throws java.lang.IllegalStateException

Values to be submitted for "update", "add" and "remove" operations.

Similar to Criteria, data values prefixed with "$" will be treated as a TaskInputExpression. Use fixedValues for any values that start with "$" but should be treated as a literal.

Parameters:

values - New values value. Default value is null

Returns:

ServiceTask instance, for chaining setter calls

Throws:

java.lang.IllegalStateException - this property cannot be changed after the underlying component has been created

getValues

public Record getValues()

Values to be submitted for "update", "add" and "remove" operations.

Similar to Criteria, data values prefixed with "$" will be treated as a TaskInputExpression. Use fixedValues for any values that start with "$" but should be treated as a literal.

Returns:

Current values value. Default value is null

getDataSource

public DataSource getDataSource()

DataSource ID or DataSource instance to be used.

Returns:

DataSource

setDataSource

public void setDataSource(java.lang.String dataSource)

DataSource ID or DataSource instance to be used.

Parameters:

dataSource - dataSource Default value is null

setDataSource

public void setDataSource(DataSource dataSource)

DataSource ID or DataSource instance to be used.

Parameters:

dataSource - dataSource Default value is null