| JDT macro auto expand [message #230653] |
Tue, 06 June 2006 03:16 |
 wushilin
Messages: 1
Registered: July 2009 |
Junior Member |
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I think logging line number, method name, class name is very useful.
However, infering these informations in log4j is very slow.
We can write some code like this:
1: import org.apache.log4j.Logger;
2: public class Test {
3: public String className = "Test";
4: public static Logger log = Logger.getLogger(Test.class);
5: public void foo() {
6: String methodName = "foo";
7: int lineNumber = 7;
8: log.info(methodName, lineNumber, "Hi there!") ;
9: }
10: public void info(String methodName, int lineNumber, Object msg) {
11: log.info(className + "." + methodName + "(" + lineNumber + "):"
12: + msg);
13: }
14:}
However, as we progress, the line number/class name/method name got
changed
and it become more difficult to maintain that information.
Since jdt already have macros like $NON-NLS$, ${enclosing_method},
${enclosing_type} we can simply add some macro that could be auto expanded
upon save/load.
eg,
instead of
int lineNumber = 7;
we could write
/* JDT_MACRO:int lineNumber = ${line_number}; */
in other words, the program could be:
1: import org.apache.log4j.Logger;
2: public class Test {
3: /* JDT_MACRO:public String className = "${enclosing_type}"; */
4: public String className = "Test"; //Changed to Test automatically
5: public static Logger log = Logger.getLogger(Test.class);
6: public void foo() {
7: /* JDT_MACRO:String methodName = "${enclosing_method}"; */
8: String methodName = "foo";//Changed to Test automatically
9: /* JDT_MACRO:int lineNumber = "${line_number}"; */
10: int lineNumber = 10; //changed to 10 automatically
11: log.info(methodName, lineNumber, "Hi there!") ;
12: }
13: public void info(String methodName, int lineNumber, Object msg) {
14: log.info(className + "." + methodName + "(" + lineNumber + "):"
15: + msg);
16: }
17:}
and when file is loaded/saved, jdt add the line:
int lineNumber = 7;
below the macro line, or, if it exists, replace it.
This could applied to class name, date, method name and all existing
macros also.
Regards
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