TIBCO BW FAQ -4
91) What is Parse XML activity?
The Parse XML activity takes a binary XML file or an XML string and processes it, turning it into an XML schema tree based on the XSD or DTD specified. The preferred way to parse XML files is to use a Read File activity set to binary mode to read the XML file. Then pass the binary file contents to the Parse XML activity.
92) What is Render XML Activity?
The Render XML activity takes an instance of an XML schema element and renders it as a stream of bytes containing XML or an XML string. The schema is processed based on the XSD file specified.
93) What is WSDL?
WSDL stands for Web Services Description Language. A WSDL file is an XML instance of the XML Schema. A WSDL resource is composed of a series of definitions that describe the format and roles of messages used in web services.
94) What is the use of WSDL Palette?
The WSDL palette is used for creating, editing, validating, importing, and viewing WSDL files. These files are shared resources that describe web services. The WSDL palette’s resources are used to create and reuse abstract definitions, namely:
• Messages, which describe the data being exchanged
• PortTypes, which define a set of operations
• Operations, which describe the activities supported by the web service
95) What are the two types of WSDL required to create a Web Service?
• Abstract WSDL (Describes Structure & Elements)
• Concrete WSDL (Abstract WSDL with Transport)
96) What are the basic components of a WSDL?
• Message (Contains the request and response of a web service)
• PortType (Logical Folder to organize the web service resources)
• Operation (Services offered by the web service)
97) What are the steps to create an Abstract WSDL?
1. Select WSDL activity from the WSDL palatte
2. Describe the required Messages for the WSDL and the schema mapping for the Messages
3. Create the Logical Port by adding the “PortType” Activity to the WSDL
4. Add the required “Operations” to the “PortType” Activity.
5. Design the Operation offered by the web service.
98) What are the steps to create a Concrete WSDL?
1. Create the Abstract WSDL
2. Get the XML WSDL from either “SOAP Event Source” or the “Service WSDL” and save it in a *.wsdl file
3. Import the saved concrete WSDL file into the project
99) What are the two ways to create a web service?
SOAP Event Source
Service Palette
100) What is the advantage of using the Service Palette over the SOAP Event Source?
Using the SOAP Event Source, you can run only one operation at a time. While using the Service Palette you can run multiple operations simultaneously
101) What are the steps to create a web service using “SOAP EventSource”?
1. Define XSD
2. Define the HTTP / JMS Connection
3. Create Abstract WSDL from the XSD
4. Define the Process for the web service and replace “Start” Activity with the “SOAP Event Source” Activity from the SOAP Palette
5. Set the “Port Type” to Abstract WSDL and the Transport to HTTP / JMS Connection for the “SOAP Event Source”
6. Copy the XML WSDL form the “SOAP Event Source” to create the Concrete WSDL
7. Complete the design for the web service process
8. Create a Client Process and invoke the web service using the “SOAP Request Reply” Activty.
9. Set the “Service” Of the “SOAP Request Reply” to point to the Concrete WSDL.
102) What are the steps to create a web service using Service Palette?
1. Define XSD
2. Define the HTTP / JMS Connection
3. Create Abstract WSDL from the XSD
4. Right Click the Abstract WSDL and select “Tools or Multi-User” > “Generate Web Service” > “From WSDL”
5. Select the Transport
6. Generate the Concrete WSDL from the “WSDL Source” of the Service WSDL
7. Define the Logical Operation
8. Create a Client Process and invoke the web service using the “SOAP Request Reply” Activty.
9. Set the “Service” Of the “SOAP Request Reply” to point to the Concrete WSDL
103) What is the “Operation” activity in the WSDL Palette used for?
The Operation component describes the message formats for the incoming and outgoing messages required by the activities supported by the portType. One or more Operation components can be added to a PortType component selected in your project.
104) What is the “Retrieve Resource” Activity used for?
The Retrieve Resources activity generates a WSDL file containing a concrete service (Conrete WSDL) description of any process definition that has a SOAP Event Source process starter. This allows clients to access the WSDL for a web service. The client can then use the WSDL file to invoke the web service. The Retrieve Resources activity can also be used to retrieve any other resources, including XSDs and WSIL.
105) What is the “SOAP Event Source” Activity used For?
The “SOAP Event Source” process starter creates a process instance for incoming SOAP requests. SOAP is a standard protocol for invoking web services. This allows you to create a web service using process definitions. Upon retrieval of the WSDL, the client can perform a SOAP request to invoke the web service.
106) What is the “SOAP Send Reply” activity used for?
The SOAP Send Reply activity sends a reply to an application that sent a SOAP request. This activity is primarily used in process definitions that implement web services. When a SOAP Event Source is used as the process starter, the SOAP Send Reply activity is used to send the reply to the request that starts the process instance.
107) What is SOAP Fault?
The SOAP Fault element is used to carry error and/or status information within a SOAP message.
108) What is the difference between “SOAP over JMS” and “SOAP over HTTP”?
The advantage of using “SOAP over JMS” over “SOAP over HTTP” is reliability as you may use the persistence and acknowledgment features built in the standard. The same applies if you need to establish asynchronous communication or need to use the load balancing features provided by JMS servers. You can achieve this using http but the implementation would be much more complicated.
109) What is the “Context Resource” used for?
The “Context Resource” allow you to specify a schema to hold context data from an incoming request or outgoing replies to a service. This allows you to pass on data, such as the username and password sent by the requesting application. Also, you can pass data from the process that implements an operation back to the Service for any outgoing reply message. The Context Resource can also be used to store SOAP headers or message attachments.
110) What is the “Get Context” activity used for?
The Get Context activity retrieves the value of the specified “Context Resource”. This is useful if your process definition requires some context information from an incoming request (Like Username & Password etc.).
111) What are supported SQL Operations in database adapters?
The database adapter supports the following SQL operations for publishing and subscribing:
• INSERT
• UPDATE
• DELETE
• UPDATE/INSERT (update if row exists, otherwise insert).
112) What are modes of operation for File Adapter in Record Mode?
• Synchronous mode upon receiving an event, the publication service will allow other services in the instance only after it completes the processing and publishing of all the files that match the specified criteria.
• In Asynchronous mode the publication service allows other services of the instance to receive events while it is processing and publishing a file. By default Subscription service always operates in Asynchronous mode.
The Parse XML activity takes a binary XML file or an XML string and processes it, turning it into an XML schema tree based on the XSD or DTD specified. The preferred way to parse XML files is to use a Read File activity set to binary mode to read the XML file. Then pass the binary file contents to the Parse XML activity.
92) What is Render XML Activity?
The Render XML activity takes an instance of an XML schema element and renders it as a stream of bytes containing XML or an XML string. The schema is processed based on the XSD file specified.
93) What is WSDL?
WSDL stands for Web Services Description Language. A WSDL file is an XML instance of the XML Schema. A WSDL resource is composed of a series of definitions that describe the format and roles of messages used in web services.
94) What is the use of WSDL Palette?
The WSDL palette is used for creating, editing, validating, importing, and viewing WSDL files. These files are shared resources that describe web services. The WSDL palette’s resources are used to create and reuse abstract definitions, namely:
• Messages, which describe the data being exchanged
• PortTypes, which define a set of operations
• Operations, which describe the activities supported by the web service
95) What are the two types of WSDL required to create a Web Service?
• Abstract WSDL (Describes Structure & Elements)
• Concrete WSDL (Abstract WSDL with Transport)
96) What are the basic components of a WSDL?
• Message (Contains the request and response of a web service)
• PortType (Logical Folder to organize the web service resources)
• Operation (Services offered by the web service)
97) What are the steps to create an Abstract WSDL?
1. Select WSDL activity from the WSDL palatte
2. Describe the required Messages for the WSDL and the schema mapping for the Messages
3. Create the Logical Port by adding the “PortType” Activity to the WSDL
4. Add the required “Operations” to the “PortType” Activity.
5. Design the Operation offered by the web service.
98) What are the steps to create a Concrete WSDL?
1. Create the Abstract WSDL
2. Get the XML WSDL from either “SOAP Event Source” or the “Service WSDL” and save it in a *.wsdl file
3. Import the saved concrete WSDL file into the project
99) What are the two ways to create a web service?
SOAP Event Source
Service Palette
100) What is the advantage of using the Service Palette over the SOAP Event Source?
Using the SOAP Event Source, you can run only one operation at a time. While using the Service Palette you can run multiple operations simultaneously
101) What are the steps to create a web service using “SOAP EventSource”?
1. Define XSD
2. Define the HTTP / JMS Connection
3. Create Abstract WSDL from the XSD
4. Define the Process for the web service and replace “Start” Activity with the “SOAP Event Source” Activity from the SOAP Palette
5. Set the “Port Type” to Abstract WSDL and the Transport to HTTP / JMS Connection for the “SOAP Event Source”
6. Copy the XML WSDL form the “SOAP Event Source” to create the Concrete WSDL
7. Complete the design for the web service process
8. Create a Client Process and invoke the web service using the “SOAP Request Reply” Activty.
9. Set the “Service” Of the “SOAP Request Reply” to point to the Concrete WSDL.
102) What are the steps to create a web service using Service Palette?
1. Define XSD
2. Define the HTTP / JMS Connection
3. Create Abstract WSDL from the XSD
4. Right Click the Abstract WSDL and select “Tools or Multi-User” > “Generate Web Service” > “From WSDL”
5. Select the Transport
6. Generate the Concrete WSDL from the “WSDL Source” of the Service WSDL
7. Define the Logical Operation
8. Create a Client Process and invoke the web service using the “SOAP Request Reply” Activty.
9. Set the “Service” Of the “SOAP Request Reply” to point to the Concrete WSDL
103) What is the “Operation” activity in the WSDL Palette used for?
The Operation component describes the message formats for the incoming and outgoing messages required by the activities supported by the portType. One or more Operation components can be added to a PortType component selected in your project.
104) What is the “Retrieve Resource” Activity used for?
The Retrieve Resources activity generates a WSDL file containing a concrete service (Conrete WSDL) description of any process definition that has a SOAP Event Source process starter. This allows clients to access the WSDL for a web service. The client can then use the WSDL file to invoke the web service. The Retrieve Resources activity can also be used to retrieve any other resources, including XSDs and WSIL.
105) What is the “SOAP Event Source” Activity used For?
The “SOAP Event Source” process starter creates a process instance for incoming SOAP requests. SOAP is a standard protocol for invoking web services. This allows you to create a web service using process definitions. Upon retrieval of the WSDL, the client can perform a SOAP request to invoke the web service.
106) What is the “SOAP Send Reply” activity used for?
The SOAP Send Reply activity sends a reply to an application that sent a SOAP request. This activity is primarily used in process definitions that implement web services. When a SOAP Event Source is used as the process starter, the SOAP Send Reply activity is used to send the reply to the request that starts the process instance.
107) What is SOAP Fault?
The SOAP Fault element is used to carry error and/or status information within a SOAP message.
108) What is the difference between “SOAP over JMS” and “SOAP over HTTP”?
The advantage of using “SOAP over JMS” over “SOAP over HTTP” is reliability as you may use the persistence and acknowledgment features built in the standard. The same applies if you need to establish asynchronous communication or need to use the load balancing features provided by JMS servers. You can achieve this using http but the implementation would be much more complicated.
109) What is the “Context Resource” used for?
The “Context Resource” allow you to specify a schema to hold context data from an incoming request or outgoing replies to a service. This allows you to pass on data, such as the username and password sent by the requesting application. Also, you can pass data from the process that implements an operation back to the Service for any outgoing reply message. The Context Resource can also be used to store SOAP headers or message attachments.
110) What is the “Get Context” activity used for?
The Get Context activity retrieves the value of the specified “Context Resource”. This is useful if your process definition requires some context information from an incoming request (Like Username & Password etc.).
111) What are supported SQL Operations in database adapters?
The database adapter supports the following SQL operations for publishing and subscribing:
• INSERT
• UPDATE
• DELETE
• UPDATE/INSERT (update if row exists, otherwise insert).
112) What are modes of operation for File Adapter in Record Mode?
• Synchronous mode upon receiving an event, the publication service will allow other services in the instance only after it completes the processing and publishing of all the files that match the specified criteria.
• In Asynchronous mode the publication service allows other services of the instance to receive events while it is processing and publishing a file. By default Subscription service always operates in Asynchronous mode.
Comments
Post a Comment