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src.com.ibm.as400.access.doc-files.SystemProperties.html Maven / Gradle / Ivy

System properties

You can specify system properties to configure various aspects of the IBM 
  Toolbox for Java. For example, you can use system properties to define a proxy
  server or a level of tracing. System properties are useful for convenient runtime
  configuration without needing to recompile code. System properties work like
  environment variables in that when you change a system property during runtime,
  the change is generally not reflected until the next time you run the application.

There are several ways that you can set system properties:


  
Using the java.lang.System.setProperties() method
    
You can set system properties programmatically by using the java.lang.System.setProperties()
      method.
    
For example, the following code sets the com.ibm.as400.access.AS400.proxyServer
      property to hqoffice:
    
Properties systemProperties = System.getProperties();
   systemProperties.put ("com.ibm.as400.access.AS400.proxyServer", "hqoffice");
   System.setProperties (systemProperties);
  
  
Using the -D option of the java command
    
Many environments allow you to set system properties when running applications
      from a command line by using the -D option of the java
      command.
    
For example, the following program runs the application called Inventory
      with the com.ibm.as400.access.AS400.proxyServer property set
      to hqoffice:
    
   java -Dcom.ibm.as400.access.AS400.proxyServer=hqoffice Inventory
  
  
Using a jt400.properties file
    
In some environments, it may be inconvenient to instruct all users to set
      their own system properties. As an alternative, you can specify IBM Toolbox
      for Java system properties in a file called jt400.properties that is searched
      for as if it is part of the com.ibm.as400.access package. In other words,
      place the jt400.properties file in a com/ibm/as400/access directory pointed
      to by the classpath.
    
For example, set the com.ibm.as400.access.AS400.proxyServer
      property to hqoffice by inserting the following line into the
      jt400.properties file:
    
   com.ibm.as400.access.AS400.proxyServer=hqoffice
    
The backslash character (\) functions as an escape character in properties
      files. Specify a literal backslash character by using two backslashes (\\).
    
Modify this sample of a jt400.properties
      file for your environment.
  
  
Using a Properties class
    
Some browsers do not load properties files without explicitly changing
      security settings. However, most browsers do allow properties in .class
      files, so IBM Toolbox for Java system properties can also be specified
      by a class called com.ibm.as400.access.Properties which extends java.util.Properties.
    
For example, to set the com.ibm.as400.access.AS400.proxyServer
      property to hqoffice, use the following Java code:
    
   package com.ibm.as400.access;

   public class Properties
   extends java.util.Properties
   {
      public Properties ()
      {
         put ("com.ibm.as400.access.AS400.proxyServer", "hqoffice");
      }
   }
    
Modify and compile this sample
      of a Properties.java source file for your environment.
  


If an IBM Toolbox for Java system property is set using more than one of
the mechanisms described above, then the precedence is as follows (in order of
decreasing precedence):


  
The system property set programmatically using java.lang.System.setProperties()
  
The system property set using the -D option of the java command
  
The system property set using a Properties class
  
The system property set using a jt400.properties file


IBM Toolbox for Java supports the following system properties:

  
Proxy server properties
  
Trace properties
  
CommandCall/ProgramCall properties


Proxy server properties



  
Proxy server property
  
Description

  
com.ibm.as400.access.AS400.proxyServer
  
Specifies the proxy server host name and port number, using the format:
      
   hostName:portNumber
      The port number is optional.


    
 com.ibm.as400.access.SecureAS400.proxyEncryptionMode 
    
    
 
      
Specifies which portion of the proxy data flow is encrypted by using 
        SSL. Valid values are:
      

        
 1 = Proxy client to proxy server
        
 2 = Proxy server to IBM i system
        
 3 = Proxy client to proxy server and proxy server to IBM i system 
        
      
    


    
 com.ibm.as400.access.TunnelProxyServer.clientCleanupInterval 
    
    
Specifies how often, in seconds, the proxy server looks for idle connections. 
      The proxy server starts a thread to look for clients that are no longer 
      communicating. Use this property to set how often the thread looks for idle 
      connections.


    
 com.ibm.as400.access.TunnelProxyServer.clientLifetime 
    
    
 Specifies how long, in seconds, a client can be idle before the proxy 
      server removes references to the objects so the JVM can garbage collect 
      them. The proxy server starts a thread to look for clients that are no longer 
      communicating. Use this property to set how long a client can be idle before 
      performing garbage collection on it.




Trace properties

  
 
    
Trace property
    
Description
  
  
 
    
com.ibm.as400.access.Trace.category
    
Specifies which trace categories to enable. This is a comma-delimited 
      list containing any combination of trace categories. The complete list of 
      trace categories is defined in the  
      Trace class.
  
  
 
    
com.ibm.as400.access.Trace.file
    
Specifies the file to which trace output is written. The 
      default is to write trace output to System.out.
  
  

    
com.ibm.as400.access.ServerTrace.JDBC
    
Specifies which trace categories to start on the JDBC server 
      job. For information about supported values, see the JDBC 
      server trace property.
  


CommandCall/ProgramCall properties


  
CommandCall/ProgramCall property
  
Description

    
com.ibm.as400.access.CommandCall.threadSafe
    
Specifies whether CommandCalls should be assumed to be thread-safe. If true,
      all CommandCalls are assumed to be thread-safe. If false, all
      CommandCalls are assumed to be non-thread-safe. This property is ignored
      for a given CommandCall object if either CommandCall.setThreadSafe(true/false)
      or AS400.setMustUseSockets(true) has been performed on the
      object.
  

    
com.ibm.as400.access.ProgramCall.threadSafe
    
Specifies whether ProgramCalls should be assumed to be thread-safe. If true,
      all ProgramCalls are assumed to be thread-safe. If false, all
      ProgramCalls are assumed to be non-thread-safe. This property is ignored
      for a given ProgramCall object if either ProgramCall.setThreadSafe(true/false)
      or AS400.setMustUseSockets(true) has been performed on the
      object.