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The Open Source version of the IBM Toolbox for Java
package com.ibm.as400.util;
import com.ibm.as400.access.*;
import com.ibm.as400.resource.*;
import java.io.PrintStream;
import java.util.StringTokenizer;
import java.util.Enumeration;
import java.util.*;
/**
* This class is used to optimize an AS400 classpath using the CRTJVAPGM command.
* The original need was a software update/install procedure that needed to make sure
* all the classes in the classpath were optimized at the appropriate levels. We
* needed something that didn't recompile classes if they were already optimized, as
* our app was large (over 10MB) and it could take several hours and LOTS of cpu to
* optimize at level 40. We needed something that did "touch up" optimizations.
* Here is an example of how you can use it...
*
*
* public static void main(String args[]) throws Exception {
*
* String classpath = "/home/toronto/DEV/:/home/toronto/DEV/server.jar:" +
* "/home/toronto/DEV/preprocessor.jar:/qibm/ProdData/HTTP/Public/jt400/lib/jt400.jar:" +
* "/qibm/proddata/java400/jt400ntv.jar:/home/toronto/DEV/collections.jar:" +
* "/home/toronto/DEV/antlr.jar:/home/toronto/DEV/crimson.jar:/home/toronto/DEV/xalan.jar:" +
* "/home/toronto/DEV/jaxp.jar:";
*
* AS400 as400 = new AS400( "mysystem", "user", "password" );
* AS400ClassPathOptimizer cpo = new AS400ClassPathOptimizer( as400, classpath );
*
* cpo.setOptimizationLevel( cpo.LEVEL_40 );
* cpo.setLicensedInternalCodeOptions( cpo.LICOPT_NOPRERESOLVEEXTREF );
*
* // submit the optimizations and exit since this could take some time
* cpo.setOptimizeInParallel( true );
*
* // so we can see the details of what it is doing...
* cpo.setOutputLog( System.out );
*
* // submit the optimizations
* cpo.optimize();
*
* System.exit( 0 );
* }
*
* @author Glen Marchesani
**/
public class AS400ClassPathOptimizer {
//------------------------------------------------------------------------------
// constants
public static final int NO_OPTIMIZATION = 0;
public static final int LEVEL_10 = 10;
public static final int LEVEL_20 = 20;
public static final int LEVEL_30 = 30;
public static final int LEVEL_40 = 40;
public static final String LICOPT_NOPRERESOLVEEXTREF = "NOPRERESOLVEEXTREF";
//------------------------------------------------------------------------------
// instance variables
private AS400 as400_;
private CommandCall commandCall_;
private String classpath_;
private boolean wait_ = false;
private boolean optimizeInParallel_ = false;
private int optimizationLevel_= NO_OPTIMIZATION;
private boolean optimizeDirectories_ = false;
private String licensedInternalCodeOptions_ = LICOPT_NOPRERESOLVEEXTREF;
private PrintStream out_;
//------------------------------------------------------------------------------
// constructors
public AS400ClassPathOptimizer() {
this( null, null );
}
public AS400ClassPathOptimizer( AS400 as400 ) {
this( as400, null );
}
public AS400ClassPathOptimizer( AS400 as400, String classpath ) {
setAS400( as400 );
setClasspath( classpath );
}
//------------------------------------------------------------------------------
// methods
/**
* set the AS400 classpath to opimize. valid path separators are ; and :
*
*/
public void setClasspath( String classpath ) {
classpath_ = classpath;
}
public void setAS400( AS400 as400 ) {
as400_ = as400;
}
/**
* if true the optimize() method will wait for all CRTJVAPGM commands to end
* before it returns. Otherwise
*
*/
public void setWaitForOptimizations( boolean s ) {
wait_ = s;
}
public boolean isWaitForOptimizations() {
return wait_;
}
/**
* if true run each CRTJVAPGM in a separate job. Using a value of true setting will ignore the "wait for optimizations" attribute.
* if false will run each CRTJVAPGM in serial waiting for the first to end before the next CRTJBAPGM is run.
*
*/
public void setOptimizeInParallel( boolean s ) {
optimizeInParallel_ = s;
}
public void setOptimizeDirectories( boolean b ) {
optimizeDirectories_ = b;
}
public boolean isOptimizeInParallel() {
return optimizeInParallel_;
}
public String getLicensedInternalCodeOptions() {
return licensedInternalCodeOptions_;
}
/**
* Sets the value to use on the CRTJVAPGM LICOPT parameter
*/
public void setLicensedInternalCodeOptions( String s ) {
licensedInternalCodeOptions_ = s;
}
/**
* Set the level to optimize classes to. Note that if a class/jar/zip is currently
* optimized at say level 30 and you set this at level 20 then no optimization will be done.
*
* This is not the case for optimizing a directory. If you optimize a directory the whole directory
* will be reoptimized to the level set. This is due to performance of checking the
* optimization level of say 400 classes in a directory versus making a single call
* to the CRTJVAPGM which. The single call to CRTJVAPGM (to optimize the entire directory) is almost always quicker than
* checking the 400 classes individually plus the time to optimize the classes individually.
*
*/
public void setOptimizationLevel( int level ) {
optimizationLevel_ = level;
}
public void setOutputLog( PrintStream out ) {
out_ = out;
}
public void optimize() throws Exception {
if ( optimizeInParallel_ ) {
wait_ = false;
}
run();
}
public void run() throws Exception {
logit( "classpath=" + classpath_ );
logit( "wait=" + wait_ );
logit( "optimizationLevel=" + optimizationLevel_ );
logit( "optimizeDirectories=" + optimizeDirectories_ );
logit( "optimizeInParallel=" + optimizeInParallel_ );
logit( "licensedInternalCodeOptions=" + licensedInternalCodeOptions_ );
StringTokenizer st = new StringTokenizer( classpath_, ";:" );
while( st.hasMoreTokens() ) {
String path = st.nextToken();
IFSFile file = new IFSFile( as400_, path );
if ( file.isDirectory() && optimizeDirectories_ == false ) {
logit( path + " is a directory and optimize directories is false." );
} else if ( file.isAbsolute() && file.exists() == false ) {
logit( path + " does not exist." );
} else if ( file.isAbsolute() == false ) {
logit( path + " must be an absolute path to be optimized." );
} else {
int level = retrieveOptimizationLevel( file );
if ( level < optimizationLevel_ ) {
optimize( file );
logit( path + " currently optimized at level " + level + " optimizing to level " + optimizationLevel_ );
} else {
logit( path + " currently optimized at level " + level + " not optimizing." );
}
}
}
}
private void optimize( IFSFile file ) throws Exception {
String command = getOptimizationCommand( file );
if ( wait_ ) {
runCommand( command );
} else if ( optimizeInParallel_ ) {
runCommand( "SBMJOB JOB(CRTJVAPGM) CMD(" + command + ")" );
}
}
void logit( String msg ) {
if ( out_ != null ) {
out_.println( msg );
}
}
private String getOptimizationCommand( IFSFile file ) throws Exception {
StringBuffer sb = new StringBuffer();
sb.append( "CRTJVAPGM " );
sb.append( "CLSF(" + file.getAbsolutePath() + ") " );
sb.append( "OPTIMIZE(" + optimizationLevel_ + ") " );
if ( file.isDirectory() && optimizeDirectories_ ) {
sb.append( "SUBTREE(*ALL) " );
}
if ( licensedInternalCodeOptions_ != null ) {
sb.append( "LICOPT(" + licensedInternalCodeOptions_ + ") " );
}
return sb.toString();
}
void runCommand( String command ) throws Exception {
if ( commandCall_ == null ) {
commandCall_ = new CommandCall( as400_ );
}
logit( command );
boolean status = commandCall_.run( command );
if ( status == false ) {
AS400Message[] log = commandCall_.getMessageList();
logit( "error running command " + command );
for ( int i=0; i