Concurrent Processing Framework

API & Download

The most recent version of the CPF is ${project.version}. For development purposes the most recent snapshot version of the CPF libraries and the trunk sub-tree in the subversion repository should be used. The snapshot and the trunk are only updated under controlled circumstances when new functionality or bug fixes are to be delivered to the plug-in developers. When delivering a final version of the application to the Ministry the plug-in must use the same version as is deployed to the Ministry’s server.

Use the links in the following table to view the Plug-in API documentation or download the API libraries.

Create a plug-in project

The first step is to create a plug-in project. Plug-ins must be developed using Apache Maven 3.0.x.

A new plug-in project can be created using the Maven archetype mechanism. The archetype defines a template project that can be created by passing in parameters to the following command.

cd ~/projects
mvn \
  archetype:generate \
  -DinteractiveMode=false \
  -DarchetypeGroupId=ca.bc.gov.open.cpf \
  -DarchetypeArtifactId=cpf-archetype-plug-in \
  -DarchetypeVersion=${project.version} \
  -DgroupId=ca.bc.gov \
  -DartifactId=demo \
  -Dversion=1.0.0-SNAPSHOT \
  -Dpackage=ca.bc.gov.demo \
  -Dplug-inName=Demo \
  -Dplug-inAcronym=demo

The following directory structure would be created if the command were run using the parameters above.

Add Dependencies

A plug-in can include dependencies to additional libraries that are not deployed as part of the core CPF application. These must be approved prior to delivering to the Ministry.

All plug-ins must either be available in the Maven central repository. Or a private repository that the CPF is configured to access.

If any of the dependencies include dependencies to logging frameworks such as LOG4J, SLF4J and especially commons-logging these must be excluded from those dependencies. This ensures that carefully controlled versions of these files are used. The CPF internally uses SLF4J as the logging API with a LOG4J binding to perform the actual logging and a bridge so that commons logging is logged via SLF4J. It is recommended for plug-ins to use SLF4J for logging in their module. Plug-ins must not include a log4j.xml file in their Jar file. A log4j.xml file can however be included in src/test/resources for testing the plug-in.

Any dependencies that are included in the CPF application itself must be marked with a scope of provided. If they are dependencies of other modules then they should be excluded from that dependency. CPF ignores any dependencies to the CPF libraries or the libraries it uses. This ensures that the correct versions of these libraries are used at runtime.

Any dependencies to test frameworks such as junit must be included using the test scope so that they are not included in the jar. Also any test code must be included below src/test as opposed to src/main.

JDBC Dependencies

The CPF supports the Oracle and PostgreSQL with PostGIS extensions JDBC drivers. The dependencies to these drivers are included through the cpf-api-plugin dependency.

NOTE: At this time no other versions of these JDBC drivers or 3rd party JDBC drivers are supported. Any dependencies to those drivers must be excluded from the plug-in’s dependencies. Other JDBC driver versions may interfere with the running of the CPF application.

Build the plug-in

The plug-in is built using maven. Use the following command to create a clean build that is deployed to your local maven repository.

mvn clean install

The plug-in must be deployed to a maven repository so that the CPF can download the plug-in. If on a developers workstation a local maven cache can be used instead of this step.

mvn deploy

Deploy a Plug-in

Plug-ins are deployed dynamically using the CPF admin application. Follow this procedure to deploy a new module.

1. Open the CPF modules admin page.
2. Click the Add button on the Modules page.
3. Enter the project acronym as the module name (e.g. DEMO), it will be converted to upper case.
4. Enter in the maven module Id for your plug-in in the format {groupId}:{artifactId}:{version}. For example com.myapplication:demo:1.0.0-SNAPSHOT.
5. Click the Save button
6. The module view page will be displayed.

If the version number of a module changes, follow this procedure to update the version for an existing module.

1. Open the CPF modules admin page.
2. Click on the name of the module in the table, this will open the module view page.
3. Click on the name of the module in the table, this will open the module view page.
4. Click Edit button to edit the module.
5. Enter in the maven module Id for your plug-in in the format {groupId}:{artifactId}:{version}. For example com.myapplication:demo:1.0.0-SNAPSHOT.
6. Click the Save button
7. The module view page will be displayed.
8. Click the restart button to load the new version of the module.

NOTE: You cannot change the name of the module. Delete the existing module and create a new one.

Java Class

A business application plug-in is implemented as a Java class with the BusinessApplicationPlugin annotation. See BusinessApplicationPlugin for details of the annotation elements that can be used to configure the business application.

A single plug-in module can have more than one plug-in class, one for each plug-in provided by that module.

Plug-in Spring Configuration File

The CPF business application plug-in classes are registered with the CPF by including the plug-in definition spring file src/main/resources/META-INF/ca.bc.gov.open.cpf.plugin.sf.xml in the Maven project.

The following file shows an example of this file.

<?xml version="1.0" encoding="UTF-8"?>
<beans
  xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:util="http://www.springframework.org/schema/util"
  xmlns:p="http://www.springframework.org/schema/p"
  xsi:schemaLocation="
    http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/util
    http://www.springframework.org/schema/util/spring-util-3.0.xsd
  "
>
  <util:list id="beanImports">
   <value>classpath:/ca/bc/gov/demo/Demo.sf.xml</value>
  </util:list>

  <bean
   id="demo"
   class="ca.bc.gov.demo.DemoPlug-in"
   p:dataSource-ref="demoDataSource"
   scope="prototype" />
</beans>

This file may only contain bean definitions for the plug-ins and an optional beanImports list.

The bean definitions must have the id attribute equal to the business application plug-in name defined in the plug-in class. The class must be the fully qualified class name of the plug-in class. The scope on the bean must be set to prototype. This ensures that a new instance of the plug-in be created on each request to get the bean. The p:{propertyName} or p:{propertyName}-ref attribute styles can be used to inject dependencies into the bean when it is created.

If the plug-in requires other beans such as JDBC data sources or a caching service that are expensive to create these must be defined in plug-in resource spring configuration files. The plug-in archetype includes a blank spring file for this purpose. The beanImports list includes a reference to each plug-in resource spring file used by the plug-ins. This is used instead of the spring import mechanism so that the beans defined in those files are only instantiated on the worker nodes. Within the plug-in definition spring file no regular spring imports can be used, spring imports can however be used in the plug-in resource spring files. Additional beanImports can be added if required.

Plug-in Resource Beans

A new instance of the plug-in class is created for each request processed in a job. Therefore the plug-in class should not perform any complex instantiation in the constructor. Instead any resources (such as data sources) or a caching service should be defined as singleton beans in the plug-in resource spring files.

The plug-in bean will have a property (set/get method pair) for each resource bean it uses.

private DataSource dataSource;

private void setDataSource(DataSource dataSource) {
  this.dataSource = dataSource;
}

private DataSource getDataSource() {
  return dataSource;
}

The ca/bc/gov/demo/Demo.sf.xml plug-in resource spring file would define the bean as shown below.

NOTE: this example introduces the JdbcDataSourceFactoryBean. This can be used to create a pooling data source without needing to know the underlying database data source used. By changing the URL to an Oracle JDBC URL it will create an Oracle data source. The config properties are set on the data source instance. Consult the database vendor’s documentation for the available parameters.

<bean
  id="demoDataSource"
  class="com.revolsys.jdbc.io.JdbcDataSourceFactoryBean"
  p:url="jdbc:postgresql://localhost:5432/demo"
  p:username="demo"
  p:password="12345678"
>
  <property
   name="config"
  >
   <map>
     <entry
       key="initialConnections"
       value="0" />
     <entry
       key="maxConnections"
       value="10" />
    </map>
  </property>
</bean>

*NOTE: Beans should not be defined with lazy-init="true". This will cause the system to think the plug-in has been loaded when not all beans are ready. This can cause worker threads to be blocked waiting for the beans to initialize.

Finally the demoDataSource bean will be injected into the dataSource property on the demo bean definition in the plug-in definition spring file.

<?xml version="1.0" encoding="UTF-8"?>
<beans
  xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:util="http://www.springframework.org/schema/util"
  xmlns:p="http://www.springframework.org/schema/p"
  xsi:schemaLocation="
    http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/util
    http://www.springframework.org/schema/util/spring-util-3.0.xsd
  "
>
  <util:list id="beanImports">
   <value>classpath:/com/mycompany/demo/Demo.sf.xml</value>
  </util:list>

  <bean
   id="demo"
   class="ca.bc.gov.demo.DemoPlug-in"
   p:dataSource-ref="demoDataSource"
   scope="prototype" />
</beans>

Any required dependencies can be injected using the basic approach shown above.

Plug-in Job Parameters & Structured Request Parameters

A plug-in can implement parameters that the user can specify when submitting a job. Parameters can be global for all the requests in a job using the JobParameter annotation. Parameters for structured input data plug-ins with perRequestInputData=false must have parameters specific to an individual request within the job using the RequestParameter annotation.

Parameter methods can also have the following annotations.

• ca.bc.gov.open.cpf.plugin.api.AllowedValues
• ca.bc.gov.open.cpf.plugin.api.DefaultValue
• ca.bc.gov.open.cpf.plugin.api.GeometryConfiguration
• ca.bc.gov.open.cpf.plugin.api.Required

Per request input data

Opaque input data plug-ins with perRequestInputData=true must implement the following methods to set the content type of the binary blob and URL which can be used to access the binary blob of the input data for that request. The input stream for the URL can be read in the execute method of the plug-in. When getting the input stream for the URL any HTTP redirects must be followed to get the final content to read.

private URL inputDataUrl;

private String inputDataContentType;

public void setInputDataUrl(final URL inputDataUrl) {
  this.inputDataUrl = inputDataUrl;
}

public void setInputDataContentType (final String inputDataContentType) {
  this.inputDataContentType = inputDataContentType;
}

Structured Result Attributes

Structured result data plug-ins with perRequestInputData=false must implement result data properties using the ResultAttribute annotation for more details.

Parameter methods can also have the following annotations.

• ca.bc.gov.open.cpf.plugin.api.GeometryConfiguration

Structured Data Geometry Request Parameters and Result Attributes

The CPF includes spatial support for structured input data and result data files. This enables plug-ins to define job parameters, request parameters and result attributes to use Java Topology Suite (JTS) Geometry objects. The CPF reads the input data files (e.g. ESRI Shapefile in a Zip file) and converts the values into JTS Geometry objects for processing by the business application. After processing the JTS Geometry objects are converted back into the requested output spatial file format. The CPF also handles projection of the geometries if required.

The CPF can use Well-known_text (WKT) and Extended WKT (EWKT) geometry strings for geometries in the input data files submitted by the user or the result data files generated by the CPF. This can be used in non-spatial file formats or where there are multiple geometries in a spatial file format that only supports a single geometry. These EWKT geometries will be converted to JST Geometry objects. EWKT geometries are also used for job parameters as they are passed as HTML form parameters. We however don’t recommend using geometries as job parameters.

Geometry Job & Request Parameters

Adding a geometry job parameter or request parameter is exactly the same as any other business application parameter. The parameter type must be a JTS Geometry class or subclass. The only difference is that the GeometryConfiguration annotation can also be specified. If the configuration is not set on the method then the annotation from the class is used.

Geometry Result Attributes

Adding a geometry result attribute is exactly the same as any other business application result attributes. The return type must be a JTS Geometry class or subclass. The only difference is that the GeometryConfiguration annotation can also be specified. If the configuration is not set on the method then the annotation from the class is used.

NOTE: All geometries created by a business application must have the SRID set on the geometry object.

The user when creating a job can override the srid, numAxis, scaleFactorXy and scaleFactorZ. The required conversion will be performed by the CPF. The business application can implement any one of the following methods to receive the values requested by the user. This might be useful if the application wants to perform it’s own projection or reduce work by not creating z-values if they are not required.

public void setResultNumAxis(final int resultNumAxis) {
  this.resultNumAxis = resultNumAxis;
}

public void setResultScaleXy(final double resultScaleXy) {
  this.resultScaleXy = resultScaleXy;
}

public void setResultScaleZ(final double resultScaleZ) {
  this.resultScaleZ = resultScaleZ;
}

public void setResultSrid(final int resultSrid) {
   this.resultSrid = resultSrid;
}

Per request result data<

Opaque input data plug-ins with perRequestResultData=true cannot return result attributes. They can only return the binary content of the result data. The plug-in must implement the following methods. The resultData output stream can be used to write the result binary blob data. The resultDataContentType indicates to the plug-in the type of result data it should generate.

private OutputStream resultData;

private String resultDataContentType;

public void setResultData(final OutputStream resultData) {
  this.resultData = resultData;
}

public void setResultDataContentType(final String format) {
  this.resultDataContentType = format;
}

Execute method

The plug-in must implement a public void execute() method. When the CPF has set all the parameters on the plug-in it invokes the execute method so that the plug-in can perform the request using the parameters and generate the result.

The following is a simple example of an execute method that takes the value request field, calculates the square and stores this in the square result attribute.

public void execute() {
  this.square = this.value * this.value;
}

The following is an example of a per request input data execute method. The plug-in gets the input stream from the inputDataUrl, performs some processing on the data and stores the result in the digest result attribute.

public void execute() {
  try {
    MessageDigest digester = MessageDigest.getInstance("MD5");
    InputStream in = this.inputDataUrl.openStream();
    byte[] buffer = new byte[4096];
    for (int count = in.read(buffer); count != -1; count = in.read(buffer)) {
       digester.update(buffer, 0, count);
     }
    byte[] data = digester.digest();
    this.digest = new String(Hex.encodeHex(data));
  } catch (NoSuchAlgorithmException e) {
    throw new IllegalArgumentException("Cannot find digest algorithm " + algorithmName, e);
  } catch (IOException e) {
    throw new RuntimeException("Cannot read input data", e);
  }
}

The following is an example of a per request result data execute method. The plug-in creates query string parameters from the plug-in request parameters and creates a connection to a web service. The plug-in then writes the response from the web service to the result data.

public void execute() {
  Map<String, Object> parameters = new LinkedHashMap<String, Object>();
  parameters.put("SERVICE", "WMS");
  parameters.put("VERSION", "1.1.1");
  parameters.put("REQUEST", "GetMap");
  parameters.put("LAYERS", this.layers);
  parameters.put("STYLES", this.styles);
  parameters.put("CRS", this.crs);
  parameters.put("BBOX", this.bbox);
  parameters.put("WIDTH", this.width);
  parameters.put("HEIGHT", this.height);
  parameters.put("FORMAT", this.resultDataContentType);
  parameters.put("EXCEPTIONS", "INIMAGE");
  String url = UrlUtil.getUrl(this.wmsUrl, parameters);
  try {
    InputStream in = new URL(url).openStream();
    try {
      FileUtil.copy(in, this.resultData);
    } finally {
      FileUtil.closeSilent(this.resultData);
      FileUtil.closeSilent(in);
    }
  } catch (MalformedURLException e) {
    throw new IllegalArgumentException(url + " is not valid URL");
  } catch (IOException e) {
    throw new RuntimeException("Unable to get map", e);
  }
}

Logging

The CPF automatically creates Log Files for each module and business application running within the master and worker processes. For a business application the log level can be changed using the Edit Business Application page without requiring a restart to the module.

NOTE: Applications MUST NOT include logging configuration files (e.g. log4j.xml) in their jars. They must also not manually create Appenders or otherwise change the logging configuration.

The preferred approach is for business application plug-ins to use the AppLog class for logging to have the messages appear in the appropriate log file.

The plug-in The plug-in may also use slf4j (preferred) or log4j or with the following logger name sub trees.

• Loggers below {ModuleName}.{BusinessApplicationName} (e.g. DEMO.demoApp).
• Loggers below the BusinessApplicationPlugin.packageName (e.g. ca.bc.gov.demo)

Memory Management

Plug-ins must ensure that their data and classes can be garbage collected when the plug-in is stopped. Below are some guidelines for ensuring garbage collection.

• Avoid using the Java singleton pattern for cached data structures. The data won’t be released until the class is garbage collected (which maybe neve depending on the JVM). Use a spring bean with the default singleton scope instead.
• Avoid aspect oriented libraries, especially that use CGLIB. These sometimes create classes that can’t get garbage collected.
• If using Java introspection/reflection, ensure that class and method references are not stored in a cache owned by another JVM. CPF has code to perform cache clearing for commons beanutils.
• Implement a cleanup method on each bean (other than the plug-in prototype bean). This method must close any resources it created (e.g. database connections), clear any cached values and preferably set any fields to null. See the spring framework documentation for details on implementing Destruction call-backs or @PreDestory annotation. Spring will automatically call those methods when the plug-in is stopped.

The CPF Tomcat JVM should be started with the following parameters to allow class unloading. Consult your JVM’s documentation for more details.

-XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -XX:+UseCodeCacheFlushing

In a non-production environment you can also turn on the following option to see the classes that were garbage collected on the console output from the Tomcat command.

-XX:+TraceClassUnloading

The following procedure can be used to see if a CPF module can be un-loaded successfully.

1. Restart the Tomcat JVM to ensure a clean start.
2. Make sure the CPF module is started (don’t restart if already started).
3. Stop the CPF module using the CPF admin application. Or to test CPF too undeploy the CPF web apps using the Tomcat manager.
4. Use the jconsole tool that comes with the JDK (not JRE) to connect to the Tomcat Java process.
5. Click on the memory tab.
6. Click on ‘Perform GC’ about 5 times to force a garbage collection.
7. Click on the Classes tab and see if the Loaded count is lower than the Total Loaded. This shows that some classes were garbage collected. You may need to do ‘Perform GC’ or wait a while as there is no contract as to when the class garbage collection will occur.
8. The following command creates a memory dump of the JVM you will need to know the process id [PID] of the Tomcat JVM. jmap -dump:live,format=b,file=cpf.hprof {PID}.
9. The cpf.hprof can be loaded into a Java Heap analyzer or the following command can be used to create a web server where you can browse the memory.
10. jhat -J-mx1024m cpf.hprof (NOTE: you may need more memory depending on the amount of memory used in the Tomcat JVM).
11. Open http://localhost:7000/ in a web browser. The Show Instance Counts page is the most useful as it shows the counts of objects by class for non core Java class.
12. Check that the custom classes used by your application do no appear on this page. If they do then the application has not been garbage collected.
13. Click the instances link next to a class to see the instances. From there you can navigate to see the references to that object. This will help identify where cleanup code should be implemented.

Defining Customization Properties

The customization properties can be defined using an optional properties map bean in the ca.bc.gov.open.cpf.plug-in.sf.xml file.

The map can contain a default entry, or an entry for each business application name. The value for each entry is a map of the customization properties. If the property is not specified for a business application then the value from the default entry is used.

Example Plug-in Customization Properties

<util:map id="properties">
  <entry key="default">
   <map>
     <entry
       key="kmlPlaceMarkNameAttribute</b>></em>
       value="fieldA</b>></em> />
    </map>
  </entry>
  <entry key="demo">
   <map>
     <entry
       key="kmlPlaceMarkNameAttribute</b>></em>
        value="fieldB</b>></em> />
   </map>
  </entry>
</util:map>

Customization properties can also be set by adding a config property for a business application using the admin web application.

1. Open the CPF modules admin page.
2. Click on the name of the module in the table, this will open the module view page.
3. Click the Business Applications tab to view the list of business applications.
4. Click on the name of the business application in the table, this will open the business application view page.
5. Click the Config Properties tab to view the current properties.
6. Click the id of a property to view it and then click Edit to change the value or click Add to add a new property.

Form Customization Properties

The following customization properties are used to define the sections to group fields on the forms and the default values for fields on the job submission forms.

<util:map id="properties">
  <entry key="demo">
    <map>
      <entry key="formSectionsOpen">
        <set>
          <value>applicationParameters</value>
          <value>inputData</value>
          <value>resultFormat</value>
        </set>
      </entry>
      <entry key="formSectionsOpenInstant">
        <set>
          <value>applicationParameters</value>
          <value>requestParameters</value>
          <value>resultFormat</value>
        </set>
      </entry>
      <entry key="formSectionsOpenSingle">
        <set>
          <value>applicationParameters</value>
          <value>requestParameters</value>
          <value>resultFormat</value>
        </set>
      </entry>
    </map>
  </entry>
</util:map>

<map>
  <entry key="inputData">
    <list>
      <value>inputDataContentType</value>
      <value>inputDataUrl</value>
      <value>inputData</value>
      <value>srid</value>
    </list>
  </entry>
  <entry key="resultFormat">
    <list>
      <value>resultSrid</value>
      <value>resultDataContentType</value>
      <value>format</value>
    </list>
  </entry>
  <entry key="resultFormatAdvanced">
    <list>
      <value>resultNumAxis</value>
      <value>resultScaleFactorXy</value>
      <value>resultScaleFactorZ</value>
    </list>
  </entry>
  <entry key="notification">
    <list>
      <value>notificationEmail</value>
      <value>notificationUrl</value>
    </list>
  </entry>
  <entry key="testParameters">
    <list>
      <value>cpfPlug-inTest</value>
      <value>cpfMinExecutionTime</value>
      <value>cpfMeanExecutionTime</value>
      <value>cpfStandardDeviation</value>
      <value>cpfMaxExecutionTime</value>
      <value>cpfMeanNumResults</value>
    </list>
  </entry>
</map>

<util:map id="properties">
  <entry key="demo">
    <map>
      <entry key="formSectionsMapInstant">
        <map>
          <entry key="jobParmaters">
            <list>
              <value>jobParameter1</value>
            </list>
          </entry>
        </map>
      </entry>
      <entry key="formSectionsMapSingle">
        <map>
          <entry key="jobParmaters">
            <list>
              <value>jobParameter1</value>
            </list>
          </entry>
        </map>
      </entry>
    </map>
  </entry>
</util:map>

Result File Customization Properties

The following customization properties are supported.

See the kml reference guide for details on how to use the KML attributes.

Result file customization properties can also be specified on a plug-in class or on the result object for plug-ins that return a list of results. This allows the property to be calculated for each result. For example the kmlStyleUrl may vary based on the type of result. The following example show the optional method that must be implemented for plug-ins that wish to define per result configuration properties.

Example Plug-in Result Customization Properties

public Map<String,Object> getCustomizationProperties() {
  Map<String,Object> properties = new HashMap<>();
  properties.put("propertyName", "propertyValue");
  String styleId = "demo"; /** Calculated from some field on object */
  properties.put("kmlStyleUrl", "http://gov.bc.ca/kmlStyle.kml#" + styleId);
  return properties;
}

Security Groups

The CPF uses groups of users to manage the security policies for plug-ins. All policies are associated with security groups as opposed to individual users.

See the CPF Admin Guide for more detail on managing groups using the CPF admin application.

There are three types of user group.

Security Permissions

The CPF allows security permissions to be granted to groups of users. Security permissions grant members of a group permission to perform a specified action on a resource. Negative permissions that deny access to a resource are not supported.

The special value ‘All’ can be used as a wildcard for the resourceClass, resourceId or action. When enforcing permissions the ‘All’ value will match any requested value for that attribute when the plug-in uses the security service to check if a user can access a resource.

Security permissions can be granted using the CPF admin application.

1. Open the CPF modules admin page.
2. Click on the name of the module in the table, this will open the module view page.
3. Click the User Groups tab to view the groups available for the module, it will include USER_TYPE, GLOBAL and module specific groups.
4. Click the name of a group to view it and then click Edit to change the group name or description. Editing is only possible for module specific groups.
5. On the View user group page click the User Group Permissions tab to add, view and edit permissions.

Security Configuration File

In addition to manually defining security groups and permissions using the CPF Admin Application a plug-in can include a configuration file in the plug-in jar. The following must be created as a JSON document.

src/main/resources/META-INF/ca.bc.gov.open.cpf.plugin.UserGroups.json

The User Groups config file is a JSON list of JSON objects. Each object represents a user group to be created or to create permissions for. Only groups starting with the {Module Name}_ prefix will be created. The USER_TYPE or GLOBAL groups must already exist for permissions to be added to them.

The following table shows the JSON attributes for a permission object.

The following example shows a group called DEMO_PARTNER that will be created if it does not exist. The members of that group will be granted the permission to View the Demo Report. Members of the BCGOV_INTERNAL group will be granted permission to View All reports.

[
  {
    "name": "DEMO_PARTNER",
    "permissions": [
      {
        "resourceClass"  : "reportName",
        "resourceId"     : "Demo Report",
        "action"         : "View"
      }
    ]
  },
  {
    "name": BCGOV_INTERNAL,
    "permissions": [
      {
        "resourceClass  : "reportName",
        "resourceId     : "All",
        "action         : "View"
      }
    ]
  }
]

Business Application Permissions

Plug-ins can control the the users that can use a business application using the batchModePermission or instantModePermission annotation parameters on the plug-in class.

The permissions can be overridden on the Business Application Edit page in the CPF admin web application.

1. Open the CPF modules admin page.
2. Click on the name of the module in the table, this will open the module view page.
3. Click the Business Applications tab.
4. Click the name of a business application to view it and then click Edit.
5. Edit the Batch Mode Permission or Instant Mode Permission with a valid Spring security expression.

Request Level Security

Plugi-ins can control access to individual requests in the BusinessApplicationPlugin class. See the [SecurityService](cpf-api-plugin/java-api/#ca.bc.gov.open.cpf.plugin.api.security.SecurityService for more details.

CPF Web Site

If the CPF is deployed to /cpf on localhost the list of business applications can be found using the following page.

(http://localhost/cpf/ws/apps/)

Click on the link for a business application to get the list of resources for that application. Depending on the plug-in the following resources maybe available.

Use one of the above forms to create a new job and then download the results to confirm that the plug-in works as expected.

Test Harness

The BusinessApplicationPluginExecutor class allows developers to execute a single request against their plug-in without deploying it to the CPF infrastructure. The executor converts the input parameters to a JSON object and back again to simulate what happens in the internal CPF processing.

To create a test harness construct an instance of ca.bc.gov.open.cpf.plugin.api.BusinessApplicationPluginExecutor and then use one of the following methods to invoke the plug-in.