Tuesday, May 29, 2012

Some handy JSF utility methods

Some handy JSF utility methods:

import java.io.*;
import java.text.*;
import java.util.*;
import javax.faces.application.*;
import javax.faces.component.UIViewRoot;
import javax.faces.context.FacesContext;
import javax.faces.el.ValueBinding;

import javax.servlet.http.HttpSession;
import oracle.adf.view.faces.model.UploadedFile;


public class JSFUtils {

    private static final String NO_RESOURCE_FOUND = "Missing resource: ";

    /**
       * Method for taking a reference to a JSF binding expression and returning
       * the matching object (or creating it)     
       */
    public static Object resolveExpression(FacesContext ctx,
                                           String expression) {
        Application app = ctx.getApplication();
        ValueBinding bind = app.createValueBinding(expression);
        return bind.getValue(ctx);
    }

    /**
       * Convenience method for resolving a reference to a managed bean by name
       * rather than by expression
       */
    public static Object getManagedBeanValue(FacesContext ctx,
                                             String beanName) {
        StringBuffer buff = new StringBuffer("#{");
        buff.append(beanName);
        buff.append("}");
        return resolveExpression(ctx, buff.toString());
    }

    /**
       * Method for setting a new object into a JSF managed bean
       * Note: will fail silently if the supplied object does
       * not match the type of the managed bean
      */
    public static void setExpressionValue(FacesContext ctx, String expression,
                                          Object newValue) {
        Application app = ctx.getApplication();
        ValueBinding bind = app.createValueBinding(expression);
       
        Class bindClass = bind.getType(ctx);
        if (bindClass.isPrimitive()||bindClass.isInstance(newValue)) {
            bind.setValue(ctx, newValue);
        }
    }

    /**
       * Convenience method for setting the value of a managed bean by name
       * rather than by expression
       */
    public static void setManagedBeanValue(FacesContext ctx, String beanName,
                                           Object newValue) {
        StringBuffer buff = new StringBuffer("#{");
        buff.append(beanName);
        buff.append("}");
        setExpressionValue(ctx, buff.toString(), newValue);
    }


    /**
       * Convenience method for setting Session variables
      */
    public static

    void storeOnSession(FacesContext ctx, String key, Object object) {
        Map sessionState = ctx.getExternalContext().getSessionMap();
        sessionState.put(key, object);
    }

    /**
       * Convenience method for getting Session variables
      */
    public static Object getFromSession(FacesContext ctx, String key) {
        Map sessionState = ctx.getExternalContext().getSessionMap();
        return sessionState.get(key);
    }


    /**
       * Pulls a String resource from the property bundle that
       * is defined under the application <message-bundle> element in
       * the faces config. Respects Locale
       */
    public static String getStringFromBundle(String key) {
        ResourceBundle bundle = getBundle();
        return getStringSafely(bundle, key, null);
    }


    /**
       * Convenience method to construct a <code>FacesMesssage</code>
       * from a defined error key and severity
      */
    public static FacesMessage getMessageFromBundle(String key,
                                                    FacesMessage.Severity severity) {
        ResourceBundle bundle = getBundle();
        String summary = getStringSafely(bundle, key, null);
        String detail = getStringSafely(bundle, key + "_detail", summary);
        FacesMessage message = new FacesMessage(summary, detail);
        message.setSeverity(severity);
        return message;
    }

    /*
       * Internal method to pull out the correct local
       * message bundle
       */

    private static ResourceBundle getBundle() {
        FacesContext ctx = FacesContext.getCurrentInstance();
        UIViewRoot uiRoot = ctx.getViewRoot();
        Locale locale = uiRoot.getLocale();
        ClassLoader ldr = Thread.currentThread().getContextClassLoader();
        return ResourceBundle
        .getBundle(ctx.getApplication().getMessageBundle(), locale, ldr);
    }

    /*
       * Internal method to proxy for resource keys that don't exist
       */

    private static String getStringSafely(ResourceBundle bundle, String key,
                                          String defaultValue) {
        String resource = null;                                         
        try {                                         
            resource = bundle.getString(key);
        }
        catch (MissingResourceException mrex) {
            if (defaultValue != null) {
                resource = defaultValue;
            } else {
                resource = NO_RESOURCE_FOUND + key;
            }
        }
        return resource;
    }
    /**
     *
     * @param msg
     */
    public static void addFacesErrorMessage(String msg) {
        FacesContext ctx = getFacesContext();
        FacesMessage fm = new FacesMessage(FacesMessage.SEVERITY_ERROR,msg,null);
        ctx.addMessage(getRootViewComponentId(),fm);
      }
      /**
     *
     * @return
     */
    public static FacesContext getFacesContext() {
         return FacesContext.getCurrentInstance();
       }
       /**
     *
     * @return
     */
    public static String getRootViewComponentId() {
         return getFacesContext().getViewRoot().getId();
       } 
       /**
     *
     * @param beanname
     * @return
     */
       public static Object getBeanByName(String beanname) {
           FacesContext ctx = getFacesContext();
           Application app = ctx.getApplication();    
           return app.getVariableResolver().resolveVariable(ctx,beanname);
       }
      
      
      
     
    public static void  addValuesToSession(String key,String value) {
   
        FacesContext context = FacesContext.getCurrentInstance();
        HttpSession session = (HttpSession) context.getExternalContext().getSession(false);
        session.setAttribute(key, value);
       
    }
   
 
}


Some handy utility methods for XPath

Some handy utility methods for XPath:

import com.collaxa.cube.xml.xpath.SimpleNamespaceContext;
import java.util.*;
import javax.xml.namespace.NamespaceContext;
import javax.xml.xpath.*;
import oracle.bpel.services.common.util.XMLUtil;
import oracle.tip.pc.infra.exception.PCException;

import oracle.xml.xpath.JXPathFactory;
import org.w3c.dom.*;

    public class XPathUtils
{

    public XPathUtils()
    {
    }

    public static NodeList selectNodes(Element pElement, String xpathExpression)
        throws Exception
    {
        XPath xPath = createXPath();
        Document doc = null;
        if(pElement instanceof Document)
            doc = (Document)pElement;
        else
            doc = pElement != null ? pElement.getOwnerDocument() : null;
        NodeList value = (NodeList)xPath.evaluate(xpathExpression, doc, XPathConstants.NODESET);
        return value;
    }

    public static NodeList selectNodes(Element pElement, String xpathExpression, Map prefixNamespaceMapping)
        throws Exception
    {
        XPath xPath = createXPath(prefixNamespaceMapping);
        Document doc = null;
        if(pElement instanceof Document)
            doc = (Document)pElement;
        else
            doc = pElement != null ? pElement.getOwnerDocument() : null;
        NodeList value = (NodeList)xPath.evaluate(xpathExpression, doc, XPathConstants.NODESET);
        return value;
    }

    public static NodeList selectNodes(Element pElement, String xpathExpression, NamespaceContext namespaceContext)
        throws Exception
    {
        XPath xPath = createXPath(namespaceContext);
        Document doc = null;
        if(pElement instanceof Document)
            doc = (Document)pElement;
        else
            doc = pElement != null ? pElement.getOwnerDocument() : null;
        NodeList value = (NodeList)xPath.evaluate(xpathExpression, doc, XPathConstants.NODESET);
        return value;
    }

    public static Object evaluate(Element pElement, String xpathExpression)
        throws Exception
    {
        XPath xPath = createXPath();
        Document doc = null;
        if(pElement instanceof Document)
            doc = (Document)pElement;
        else
            doc = pElement != null ? pElement.getOwnerDocument() : null;
        Object value = xPath.evaluate(xpathExpression, doc, XPathConstants.NODESET);
        return value;
    }

    public static Object evaluate(Element pElement, String xpathExpression, Map prefixNamespaceMapping)
        throws Exception
    {
        XPath xPath = createXPath(prefixNamespaceMapping);
        Document doc = null;
        if(pElement instanceof Document)
            doc = (Document)pElement;
        else
            doc = pElement != null ? pElement.getOwnerDocument() : null;
        Object value = xPath.evaluate(xpathExpression, doc, XPathConstants.NODESET);
        return value;
    }

    public static Object selectSingleNode(Element pElement, String xpathExpression)
        throws Exception
    {
        XPath xPath = createXPath();
        Document doc = null;
        if(pElement instanceof Document)
            doc = (Document)pElement;
        else
            doc = pElement != null ? pElement.getOwnerDocument() : null;
        Node value = (Node)xPath.evaluate(xpathExpression, doc, XPathConstants.NODE);
        return value;
    }

    public static Object selectSingleNode(Element pElement, String xpathExpression, Map prefixNamespaceMapping)
        throws Exception
    {
        XPath xPath = createXPath(prefixNamespaceMapping);
        Document doc = null;
        if(pElement instanceof Document)
            doc = (Document)pElement;
        else
            doc = pElement != null ? pElement.getOwnerDocument() : null;
        Node value = (Node)xPath.evaluate(xpathExpression, doc, XPathConstants.NODE);
        return value;
    }

    public static String valueOf(Element pElement, String xpathExpression)
        throws Exception
    {
        XPath xPath = createXPath();
        Document doc = null;
        if(pElement instanceof Document)
            doc = (Document)pElement;
        else
            doc = pElement != null ? pElement.getOwnerDocument() : null;
           
        String value = (String)xPath.evaluate(xpathExpression, doc, XPathConstants.STRING);
        return value;
    }

    public static String valueOf(Element pElement, String xpathExpression, Map prefixNamespaceMapping)
        throws Exception
    {
        XPath xPath = createXPath(prefixNamespaceMapping);
        Document doc = null;
        if(pElement instanceof Document)
            doc = (Document)pElement;
        else
            doc = pElement != null ? pElement.getOwnerDocument() : null;
        String value = (String)xPath.evaluate(xpathExpression, doc, XPathConstants.STRING);
        return value;
    }

    public static Number numberValueOf(Element pElement, String xpathExpression)
        throws Exception
    {
        XPath xPath = createXPath();
        Document doc = null;
        if(pElement instanceof Document)
            doc = (Document)pElement;
        else
            doc = pElement != null ? pElement.getOwnerDocument() : null;
        Number nValue = (Number)xPath.evaluate(xpathExpression, doc, XPathConstants.NUMBER);
        return nValue;
    }

    public static Number numberValueOf(Element pElement, String xpathExpression, Map prefixNamespaceMapping)
        throws Exception
    {
        XPath xPath = createXPath(prefixNamespaceMapping);
        Document doc = null;
        if(pElement instanceof Document)
            doc = (Document)pElement;
        else
            doc = pElement != null ? pElement.getOwnerDocument() : null;
        Number nValue = (Number)xPath.evaluate(xpathExpression, doc, XPathConstants.NUMBER);
        return nValue;
    }



Update the Human task payload via JAVA API - Oracle SOA Suite 11g

Update the Human task payload via JAVA API - Oracle SOA Suite 11g:

Oracle SOA Suite 11g provides java API’s to manipulate the Human task data.The below java code will help us to update the Human task payload.

This is the Remote Java client  to get the Workflow service and perform the required operations on the task.

The XPath of the input element will be used to update the payload data.

UpdateWorkflowPayload.java

import java.util.*;
import oracle.bpel.services.workflow.IWorkflowConstants;
import oracle.bpel.services.workflow.client.*;
import oracle.bpel.services.workflow.query.ITaskQueryService;
import oracle.bpel.services.workflow.repos.*;
import oracle.bpel.services.workflow.task.ITaskService;
import oracle.bpel.services.workflow.task.model.Task;
import oracle.bpel.services.workflow.verification.IWorkflowContext;
import org.w3c.dom.Element;
public class UpdateWorkflowPayload {     
   public static void updatePayload()
    {
        List displayColumns = new ArrayList();
        displayColumns.add("TASKNUMBER");
        displayColumns.add("TITLE");
        displayColumns.add("STATE");
        displayColumns.add("CREATOR");
        List optionalInfo = new ArrayList();      
        optionalInfo.add("Comments");
        optionalInfo.add("Payload");      
    try {
              String userid="weblogic";
              String password = "password";       
              String serverUrl ="t3://localhost:8000"; // host:port of the soa server
              Map<IWorkflowServiceClientConstants.CONNECTION_PROPERTY, String> connProperties = new HashMap<IWorkflowServiceClientConstants.CONNECTION_PROPERTY, String>();              connProperties.put(IWorkflowServiceClientConstants.CONNECTION_PROPERTY.CLIENT_TYPE,WorkflowServiceClientFactory.REMOTE_CLIENT);              connProperties.put(IWorkflowServiceClientConstants.CONNECTION_PROPERTY.EJB_PROVIDER_URL,serverUrl);
              connProperties.put(IWorkflowServiceClientConstants.CONNECTION_PROPERTY.EJB_INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");       
              IWorkflowServiceClient wfSvcClient = WorkflowServiceClientFactory.getWorkflowServiceClient(connProperties, null, null);   
              IWorkflowContext ctx = wfSvcClient.getTaskQueryService().authenticate(userid, password.toCharArray(), "jazn.com" );
              ITaskQueryService querySvc = wfSvcClient.getTaskQueryService();
              ITaskService taskSvc = wfSvcClient.getTaskService();       
              Predicate statePredicate =new Predicate(TableConstants.WFTASK_STATE_COLUMN,Predicate.OP_EQ,IWorkflowConstants.TASK_STATE_ASSIGNED);
              Predicate compositenamePredicate = new Predicate(TableConstants.COMPONENT_COMPOSITE_NAME_COLUMN,Predicate.OP_EQ,"HumanWorkflow");
              Predicate predicate = new Predicate(statePredicate, Predicate.AND, compositenamePredicate);
            
       
              List tasks =querySvc.queryTasks(ctx, displayColumns, optionalInfo, ITaskQueryService.AssignmentFilter.MY,null, statePredicate, null, 0, 0);
              
              for (int i = 0; i < tasks.size(); i++) {
                       Task task = (Task)tasks.get(i);
                       String taskId = task.getSystemAttributes().getTaskId();                
                       String title = task.getTitle();
                       String state = task.getSystemAttributes().getState();
                       Task currentTask=querySvc.getTaskDetailsById(ctx,taskId);                   
                 
                       Element payload = currentTask.getPayloadAsElement();
                 
                       Map namespacemap = new HashMap();
                       namespacemap.put("ns0", "http://xmlns.oracle.com/bpel/workflow/task");
                                     
                       setPayloadValue(payload,"/ns0:task/ns0:payload/ns0:Name",namespacemap,"Albin Issac");
                       setPayloadValue(payload,"/ns0:task/ns0:payload/ns0:Number",namespacemap,"024");
                       setPayloadValue(payload,"/ns0:task/ns0:payload/ns0:Dep",namespacemap,"I.T");
                       setPayloadValue(payload,"/ns0:task/ns0:payload/ns0:Place",namespacemap,"KAMPLAR");
                 
                       currentTask.setPayloadAsElement(payload);    
                       taskSvc.updateTaskOutcome(ctx, currentTask,"APPROVE"); 
                 
                   }
                         
          } catch (Exception e) {
              e.printStackTrace();
          
          }
    }
  
   public static void setPayloadValue(Element payload,String xpath,Map namespacemap,String value) {
        try {
            XPathUtils.setNodeValue(payload, namespacemap, xpath,value);
        } catch (Exception e) {
        }
    }
   public static void main(String[] args) {
        updatePayload();
    }
}



Saturday, May 26, 2012

Exposing the BPEL process as a Http Service using HTTP Binding Adapter – Oracle SOA Suite 11g

Exposing the BPEL process as a Http Service using HTTP Binding Adapter – Oracle SOA Suite 11g:

By default the BPEL processes can be invoked via SOAP service, sometimes we may need to invoke the service from the HTTP client by using the HTTP methods – GET/POST

The HTTP Binding Adapter will help us to expose the BPEL process as an HTTP Service.

If we are exposing the service as a HTTP service, the marshaling/unmarshaling overhead related to soap can be avoided when the client invoke the service.

Steps to Expose the BPEL process as a HTTP Service:
  • Create a new SOA project with the Composite Template as Empty
  • Open the Composite.xml and Insert HTTP Binding Adapter to Exposed Services section.
  • Configure the Adapter
1.       Select the Interface Option as “Define from operation and schema specified later”
2.       Select the operation type, verb(HTTP Method) and payload type accordingly
3.       Provide the Request/Response Message Schema


 



Friday, May 25, 2012

Updating the BPEL Component preference value from JAVA – Oracle SOA Suite 11g

Updating the BPEL Component preference value from JAVA – Oracle SOA Suite 11g:

Sometimes we may need to update the preference value for the BPEL component, the below java code will help us to update the preference value.

This update is not a cluster-aware,remember that you must repeat the same process for each managed server of your environment.
Before executing the code change the mbeanName accordingly.

   String mBeanName ="*:*,j2eeType=SCAComposite.SCAComponent,revision=*,SCAComposite=\"Preference\",name=Preference";




import java.util.*;
import javax.management.*;
import javax.management.openmbean.CompositeDataSupport;
import javax.management.remote.*;
import javax.naming.Context;

public class UpdatePreferenceValue {  

    public static MBeanServerConnection getMbeanServerConnection(String host,
                                                                 int port,
                                                                 String userName,
                                                                 String password) throws Exception {
        String jndiroot = "/jndi/";
        MBeanServerConnection m_connection = null;
        try {
            Hashtable jndiProps = new Hashtable();
            jndiProps.put(Context.SECURITY_PRINCIPAL, userName);
            jndiProps.put(Context.SECURITY_CREDENTIALS, password);
            jndiProps.put(JMXConnectorFactory.PROTOCOL_PROVIDER_PACKAGES,"weblogic.management.remote");

            JMXServiceURL serviceURL =new JMXServiceURL("t3", host, port, jndiroot +"weblogic.management.mbeanservers.runtime");
            JMXConnector m_connector =JMXConnectorFactory.newJMXConnector(serviceURL, jndiProps);
            m_connector.connect();
            m_connection = m_connector.getMBeanServerConnection();

        } catch (Exception e) {

            e.printStackTrace();
        }
        return m_connection;
    }


    private static CompositeDataSupport UpdatePreferenceData(CompositeDataSupport cds,String[] keys,String[] newValues) throws Exception {
        Map<String, Object> items =new HashMap<String, Object>(cds.getCompositeType().keySet().size());

        for (String key : cds.getCompositeType().keySet()) {
            boolean matched = false;
            int i = 0;

            for (; i < keys.length; i++) {
                String searchKey = keys[i];

                if (searchKey.equalsIgnoreCase(key)) {
                    items.put(key, newValues[i]);
                    matched = true;
                    break;
                }
            }       

            if (!matched) {             
                    items.put(key, cds.get(key));
            }
         
        }
    

        return new CompositeDataSupport(cds.getCompositeType(), items);
    }
 


Monday, May 21, 2012

Using Regular Expressions with Oracle BPEL


Using Regular Expressions with Oracle BPEL:

Sometimes we may have to validate the data based on the Regular Expressions.

xp20:matches() is a function which can be used to compare data with regular expressions. This function returns true when the input matches the given expression.

xp20:matches(intputString, regexPattern)
  • inputString - The input string
  • regexPattern - The regular expression pattern
Validation of numeric fields :-
xp20:matches(bpws:getVariableData('inputString'),'^[0-9]*$')=true()

Validation of alpha fields :-
xp20:matches(bpws:getVariableData('inputString'),'^[A-Za-z]*$')=true()

Validation for list of values:-
xp20:matches(bpws:getVariableData('inputString'),'^(A|B|C|D)$') =true()

The matches function returns true if inputString variable contains any one of these values (A, B, C, and D).

The expression can be replaced with other regular expressions for similar comparisons.


Important date functions in Oracle BPEL


Important date functions in Oracle BPEL:

Format-dateTime:

This function returns the formatted string of dateTime using the format provided.

xp20:format-dateTime(dateTime as string, format as string)

  •   dateTime – The dateTime to be formatted
  •    format – The format for the output
Format String:-

Format Date Time: Year

Example
Expression
2012
[Y0001]
2012
[Y]
12
[Y01]
Two Thousand and Twelve
[YWw]

Format Date Time: Month

 Example
Expression
08
[M01]
8
[M]
VIII
[MI]
August
[MNn]
AUGUST
[MN]
Aug
[MNn,*-3]
AUG
[MN,*-3]

                                      
Format Date Time: Day

Example
Expression
05
[D01]
5
[D]
5
[D1]
31st
[D1o]
Tuesday
[FNn]


Format Date Time: Hour

Example
Expression
3
[h]
9
[H]
08
[H01]


Format Date Time: Minute
Example
Expression
03
[m01]
3
[m]

Format Date Time: Second
Example
Expression
09
[s01]
9
[s]

Format Date Time: Millisecond
Example
Expression
257
[f001]

Format Date Time: AM/PM
Example
Expression
PM
[PN]
Am
[Pn]


Format Date Time: GMT
Example
Expression
GMT+02:00
[z]


Example:-

xp20:format-dateTime(xp20:current-dateTime(),"[D01]/[M01]/[Y0001] [H01]:[m01]:[s01]")



Saturday, May 19, 2012

JAXB Mapping of XML Schema Built-in Data Types

JAXB Mapping of XML Schema Built-in Data Types  


XML Schema Type
Java Data Type
xsd:string
java.lang.String
xsd:integer
java.math.BigInteger
xsd:int
int
xsd.long
long
xsd:short
short
xsd:decimal
java.math.BigDecimal
xsd:float
float
xsd:double
double
xsd:boolean
boolean
xsd:byte
byte
xsd:QName
javax.xml.namespace.QName
xsd:dateTime
java.util.Calendar
xsd:base64Binary
byte[]
xsd:hexBinary
byte[]
xsd:unsignedInt
long
xsd:unsignedShort
int
xsd:unsignedByte
short
xsd:time
java.util.Calendar
xsd:date
java.util.Calendar
xsd:anySimpleType
java.lang.String