- Class Definition with Helper Class
- Implementing Your Own Interfaces
- Providing a Single Factory Using a Helper Method
- Write Registration Info Using a Helper Method
- Implementing without Helpers
- Storing the Service Manager for Further Use
- Create Instance with Arguments
- Possible Structures for Java Components
- Running and Debugging Java Components
To increase turnaround cycles and source level debugging, configure the IDE to use GNU makefiles for code generation and prepare Apache OpenOffice for Java debugging. If NetBeans are used, the following steps are necessary:
Support for GNU make
A NetBeans extension, available on makefile.netbeans.org, that adds basic support for GNU makefiles. When it is enabled, edit the makefile in the IDE and use the makefile to build. To install and enable this module, select Tools – Setup Wizard and click Next to go to the Module installation page. Find the module Makefiles and change the corresponding entry to True in the Enabled column. Finish using the setup wizard. If the module is not available in the installation, use Tools – Update Center to get the module from www.netbeans.org. A new entry, Makefile Support, appears in the online help when Help – Contents is selected. Makefile Support provides further configuration options. The settings Run a Makefile and Test a Makefile can be found in Tools – Options – Uncategorized – Compiler Types and – Execution Types.
Put the makefile into the project source folder that was mounted when the project was created. To build the project using the makefile, highlight the makefile in the Explorer and press F11 .
Documentation for GNU make command-line options and syntax are available at www.gnu.org. The sample Thumbs in the samples folder along with this manual contains a makefile that with a few adjustments is useful for Java components.
If NetBeans or Forte for Java is used, the Java Virtual Machine (JVM) that is launched by Apache OpenOffice can be attached. Configure the JVM used by Apache OpenOffice to listen for debugger connections. Prior to OpenOffice.org 2.x this was done by adding these lines to the java(.ini|rc) in <OfficePath>/user/config:
As of OpenOffice.org 2.x, these lines are added in the options dialog: expand the Apache OpenOffice node in the tree on the left-hand side and chose Java. On the right-hand side, push the Parameters button to open a dialog. In this dialog, enter the debug options as two separate entries. Note that the parameters have to be entered the same way as they would be provided on the command line when starting the Java executable. That is, retain the leading '-' and spaces, if necessary.
|The additional entries correspond exactly to the options you would use when running the java executable from the command line in debug mode. For more information refer to the Java SDK documentation.|
The last line causes the JVM to listen for a debugger on port 8000. The JVM starts listening as soon as it runs and does not wait until a debugger connects to the JVM. Launch the office and instantiate the Java component, so that the office invokes the JVM in listening mode.
Once a Java component is instantiated, the JVM keeps listening even if the component goes out of scope. Open the appropriate source file in the NetBeans editor and set breakpoints as needed. Choose Debug - Attach, select Java Platform Debugger Architecture (JPDA) as debugger type and SocketAttach (Attaches by socket to other VMs) as the connector. The Host should be localhost and the Port must be 8000. Click OK to connect the Java Debugger to the JVM the office has started previously step.
Once the debugger connects to the running JVM, NetBeans switches to debug mode, the output windows shows a message that a connection on port 8000 is established and threads are visible, as if the debugging was local. If necessary, start your component once again. As soon as the component reaches a breakpoint in the source code, the source editor window opens with the breakpoint highlighted by a green arrow.
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