mq5.0-source.src.share.install.sys.mq.bin.SetupJDKHome Maven / Gradle / Ivy
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/*
* @(#)SetupJDKHome.java 1.4 07/11/07
*/
import java.io.*;
import java.util.*;
/*
* java SetupJDKHome -i -j
* Defaults:
* /etc/imq/imqenv.conf
* IMQ_DEFAULT_JAVAHOME=/usr/jdk/latest
*
*/
public class SetupJDKHome {
String jdkHomeString = null;
String inputFileName = null;
StringBuffer buf = null;
private static final String IMQ_DEFAULT_JAVAHOME = "IMQ_DEFAULT_JAVAHOME=/usr/jdk/latest";
public SetupJDKHome(String inputFileName, String jdkHomeString) {
this.inputFileName = inputFileName;
this.jdkHomeString = jdkHomeString;
setDefaults();
try {
openFile();
} catch(Exception e) {
System.out.println("Problems opening file: " + e);
System.exit(1);
}
appendBuffer();
try {
writeNewFile();
} catch(Exception e) {
System.out.println("Problems writing file: " + e);
System.exit(1);
}
}
private void openFile() throws FileNotFoundException, IOException {
FileInputStream file = new FileInputStream (inputFileName);
byte[] b = new byte[file.available ()];
file.read( b );
file.close();
buf = new StringBuffer(new String(b));
System.out.println("Done reading in file: " + inputFileName);
}
private void appendBuffer() {
buf.append(jdkHomeString + "\n");
System.out.println("Appending: " + jdkHomeString);
}
private void writeNewFile() throws FileNotFoundException, IOException {
FileOutputStream file = new FileOutputStream (inputFileName);
byte[] b = buf.toString().getBytes();
file.write( b );
file.close();
System.out.println("Done writing out file: " + inputFileName);
}
private void setDefaults() {
if (jdkHomeString == null) {
jdkHomeString = IMQ_DEFAULT_JAVAHOME;
}
if (inputFileName == null) {
inputFileName = "/etc/imq/imqenv.conf";
}
}
public static void usage() {
usage(null, 0);
}
public static void usage(String msg) {
usage(msg, 0);
}
public static void usage(String msg, int exitCode) {
if (msg != null) {
System.out.println(msg);
}
System.out.println("Usage:");
System.exit(exitCode);
}
public static void main(String[] args) {
String jdkHomeString = null;
String inputF = null;
for (int i = 0; i < args.length; ++i) {
if (args[i].equals("-i")) {
if (i+1 >= args.length) {
usage("Path to input file not specified with -i", 1);
}
inputF = args[++i];
} else if (args[i].equals("-j")) {
if (i+1 >= args.length) {
usage("String containing JDK location not specified with -j", 1);
}
jdkHomeString = args[++i];
} else {
usage();
}
}
SetupJDKHome rft = new SetupJDKHome(inputF, jdkHomeString);
}
}