org.oddjob.values.properties

Class PropertiesJob

java.lang.Object

org.oddjob.framework.extend.BaseComponent

org.oddjob.framework.extend.BasePrimary

org.oddjob.framework.extend.SimpleJob

org.oddjob.framework.extend.SerializableJob

org.oddjob.values.properties.PropertiesJobBase

org.oddjob.values.properties.PropertiesJob

All Implemented Interfaces:

java.io.Serializable, java.lang.Runnable, ArooaContextAware, ArooaSessionAware, Describable, Forceable, PropertyChangeNotifier, Iconic, LogEnabled, Resetable, Stateful

public class PropertiesJob
extends PropertiesJobBase
implements Describable

Description

Creates properties that can used to configure other jobs.

There are four ways to set properties:

1. As Property name/value Pairs in the values property of this job.
2. By defining the environment attribute to be the prefix to which all environment variables will be appended as properties.
3. By using the sets property to provide a number of addition property sets which are likely to be a reference to properties defined elsewhere.
4. By defining the Input property to be a File/Resource or some other type of input.

Combinations are possible and the order of evaluation is as above. Oddjob will do it's usual property substitution using previously defined property values if required.

If the substitute property is true, property values will be evaluated for substitution.

The Properties job and PropertiesType type are very similar, the difference between them is that the job defines properties for Oddjob and the type provides properties for configuring a single job (which could be the sets property of the property job).

Example

Defining and using a property. Note the escape syntax for property expansion.

<oddjob>
  <job>
   <sequential>
    <jobs>
     <properties>
      <values>
       <value key="fruit.favourite" value="apple"/>
       <value key="snack.favourite" value="${fruit.favourite}"/>
      </values>
     </properties>
     <echo id="echo">$${snack.favourite} is ${snack.favourite}</echo>
    </jobs>
   </sequential>
  </job>
 </oddjob>

Example

Defining a property using substitution. This is the same example as previously but it is the properties job doing the substitution not the Oddjob framework. The value of snack.favourite is escaped because we want ${fruit.favourite} passed into the properties job. If the property was defined in a file it would not need to be escaped like this.

<oddjob>
    <job>
        <sequential>
            <jobs>
                <properties substitute="true">
                    <values>
                        <value key="fruit.favourite" value="apple"/>
                        <value key="snack.favourite" value="$${fruit.favourite}"/>
                    </values>
                </properties>
                <echo id="echo">$${snack.favourite} is ${snack.favourite}</echo>
            </jobs>
        </sequential>
    </job>
</oddjob>

Example

Loading properties from a class path resource.

<oddjob>
    <job>
        <sequential>
            <jobs>
                <properties>
                    <input>
                        <resource resource="org/oddjob/values/properties/PropertiesJobTest1.properties"/>
                    </input>
                </properties>
                <echo id="echo">${someones.name}</echo>
            </jobs>
        </sequential>
    </job>
</oddjob>

The properties file contains:

# properties for test

someones.name = John Smith
someones.name.title = Mr.
someones.address = London
 

This will display

 John Smith
 

Example

Overriding Properties. Normally setting a property is first come first set. Using the override property on the properties job makes the properties defined in that job take priority.

<oddjob>
  <job>
   <sequential>
    <jobs>
     <properties>
      <values>
       <value key="fruit.favourite" value="apple"/>
      </values>
     </properties>
     <echo id="echo1">$${fruit.favourite} is ${fruit.favourite}</echo>
     <properties>
      <values>
       <value key="fruit.favourite" value="pear"/>
      </values>
     </properties>
     <echo id="echo2">$${fruit.favourite} is ${fruit.favourite}</echo>
     <properties override="true">
      <values>
       <value key="fruit.favourite" value="banana"/>
      </values>
     </properties>
     <echo id="echo3">$${fruit.favourite} is ${fruit.favourite}</echo>
    </jobs>
   </sequential>
  </job>
 </oddjob>

This will display

 ${fuit.favourite} is apple
 ${fuit.favourite} is apple
 ${fuit.favourite} is banana
 

Example

Capturing Environment Variables. Note that the case sensitivity of environment variables is Operating System dependent. On Windows ${env.Path} and ${env.path} would also yield the same result. On Unix (generally) only ${env.PATH} will work.

<oddjob>
  <job>
    <sequential>
      <jobs>
        <properties id="props" environment="env"/>
        <echo id="echo-path">Path is ${env.PATH}</echo>
      </jobs>
    </sequential>
  </job>
</oddjob>

See Also:

Serialized Form

Field Summary

Fields inherited from class org.oddjob.framework.extend.SimpleJob

stop

Constructor Summary

Constructors

Constructor and Description
PropertiesJob() Default Constructor.

Method Summary

Modifier and Type	Method and Description
protected void	createPropertyLookup() Adds the property lookup to the session.
java.util.Map<java.lang.String,java.lang.String>	describe() Provides the properties.
protected int	execute() Execute this job.
protected ArooaSession	getArooaSession() Allow sub classes access the the session.
java.lang.String	getEnvironment() Getter for environment prefix.
java.lang.String	getExtract() Getter for extract.
protected PropertyLookup	getLookup() Subclasses can override the lookup.
java.lang.String	getPrefix() Getter for prefix.
java.util.Properties	getSets(int index) Indexed getter for sets.
boolean	isFromXML() Getter for fromXML.
boolean	isOverride() Are the properties override properties.
boolean	isSubstitute() Getter for substitute.
boolean	isSystem() Getter for system flag.
protected void	onReset() Allow sub classes to do something on reset.
void	setArooaContext(ArooaContext context)
void	setEnvironment(java.lang.String environment)
void	setExtract(java.lang.String extract)
void	setFromXML(boolean fromXML)
void	setInput(java.io.InputStream input)
void	setOverride(boolean override)
void	setPrefix(java.lang.String prefix)
void	setSets(int index, java.util.Properties props)
void	setSubstitute(boolean substitute)
void	setSystem(boolean system)
void	setValues(java.lang.String key, java.lang.String value)

Methods inherited from class org.oddjob.values.properties.PropertiesJobBase

addPropertyLookup, getProperties, onDestroy, setProperties

Methods inherited from class org.oddjob.framework.extend.SimpleJob

fireDestroyedState, force, getStateChanger, hardReset, iconHelper, isStop, onStop, run, sleep, softReset, stateHandler, stop

Methods inherited from class org.oddjob.framework.extend.BasePrimary

configure, getName, logger, logger, loggerName, save, setName, toString

Methods inherited from class org.oddjob.framework.extend.BaseComponent

addIconListener, addPropertyChangeListener, addStateListener, configure, destroy, firePropertyChange, iconForId, initialise, lastStateEvent, onConfigured, onInitialised, removeIconListener, removePropertyChangeListener, removeStateListener, save, setArooaSession

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.oddjob.Stateful

addStateListener, lastStateEvent, removeStateListener

Constructor Detail

PropertiesJob

public PropertiesJob()

Default Constructor.

Method Detail

setArooaContext

public void setArooaContext(ArooaContext context)

Specified by:

setArooaContext in interface ArooaContextAware

Overrides:

setArooaContext in class PropertiesJobBase

getArooaSession

protected ArooaSession getArooaSession()

Description copied from class: BaseComponent

Allow sub classes access the the session.

Overrides:

getArooaSession in class BaseComponent

Returns:

A session. Will never be null once a component is initialised within Oddjob. May be null if otherwise if the session hasn't been set.

createPropertyLookup

protected void createPropertyLookup()

Adds the property lookup to the session.

Overrides:

createPropertyLookup in class PropertiesJobBase

getLookup

protected PropertyLookup getLookup()

Description copied from class: PropertiesJobBase

Subclasses can override the lookup.

Overrides:

getLookup in class PropertiesJobBase

Returns:

execute

protected int execute()
               throws java.io.IOException,
                      ArooaConversionException

Description copied from class: SimpleJob

Execute this job.

Specified by:

execute in class SimpleJob

Returns:

0 if the job is complete, anything else otherwise.

Throws:

java.io.IOException

ArooaConversionException

describe

public java.util.Map<java.lang.String,java.lang.String> describe()

Description copied from interface: Describable

Provides the properties.

Specified by:

describe in interface Describable

Returns:

A map of property values. Must not be null.

onReset

protected void onReset()

Description copied from class: SimpleJob

Allow sub classes to do something on reset.

Overrides:

onReset in class PropertiesJobBase

getEnvironment

public java.lang.String getEnvironment()

Getter for environment prefix.

Returns:

The environment prefix. May be null.

setEnvironment

public void setEnvironment(java.lang.String environment)

Property: environment

Description: The prefix for environment variables.

Required: No.

isSystem

public boolean isSystem()

Getter for system flag.

Returns:

The system flag.

setSystem

public void setSystem(boolean system)

Property: system

Description: Set to true to set System properties rather than Oddjob properties.

Required: No. Defaults to false

setInput

public void setInput(java.io.InputStream input)

Property: input

Description: An input source for Properties.

Required: No.

setFromXML

public void setFromXML(boolean fromXML)

Property: fromXML

Description: If the input for the properties is in XML format.

Required: No, default to false.

isFromXML

public boolean isFromXML()

Getter for fromXML.

Returns:

true/false.

setValues

public void setValues(java.lang.String key,
                      java.lang.String value)

Property: values

Description: Properties defined as key value pairs.

Required: No.

setSets

public void setSets(int index,
                    java.util.Properties props)

Property: sets

Description: Extra properties to be merged into the overall property set.

Required: No.

getSets

public java.util.Properties getSets(int index)

Indexed getter for sets.

Parameters:

index - The index.

Returns:

The properites.

setSubstitute

public void setSubstitute(boolean substitute)

Property: substitute

Description: Use substitution for the values of ${} type properties.

Required: No.

isSubstitute

public boolean isSubstitute()

Getter for substitute.

Returns:

true/false.

getExtract

public java.lang.String getExtract()

Getter for extract.

Returns:

The extract prefix or null.

setExtract

public void setExtract(java.lang.String extract)

Property: extract

Description: Extract this prefix form property names. Filters out properties that do not begin with this prefix.

Required: No.

getPrefix

public java.lang.String getPrefix()

Getter for prefix.

Returns:

The appending prefix or null.

setPrefix

public void setPrefix(java.lang.String prefix)

Property: prefix

Description: Append this prefix to property names.

Required: No.

isOverride

public boolean isOverride()

Description copied from class: PropertiesJobBase

Are the properties override properties.

Specified by:

isOverride in class PropertiesJobBase

Returns:

setOverride

public void setOverride(boolean override)

Property: override

Description: Properties of this job will override any previously set.

Required: No. Default is false.