Date: 22 Dec 2003 17:47:57 -0000
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To: [EMAIL PROTECTED]
Subject: cvs commit: logging-log4j/examples/src/sort sort4.properties Sort.java sort1.properties sort3.properties sort2.properties SortAlgo.java
ceki 2003/12/22 09:47:57
Added: examples/src/sort sort4.properties Sort.java sort1.properties sort3.properties sort2.properties SortAlgo.java Log:
files in examples/sort moved to examples/src/sort
Revision Changes Path 1.1 logging-log4j/examples/src/sort/sort4.properties
Index: sort4.properties =================================================================== # Attach appender A1 to root. Set root level to Level.DEBUG. log4j.rootLogger=DEBUG, A1
# A1 is set to be a FileAppender sending its output to # System.out. However, only error messages and above will be printed # in A1 because A1's threshold is set to Level.ERROR.
# The fact that the root level is set to Prority.DEBUG only influences # log requests made to the root logger. It has no influence on the # *appenders* attached to root.
log4j.appender.A1=org.apache.log4j.ConsoleAppender log4j.appender.A1.Threshold=ERROR
log4j.appender.A1.layout=org.apache.log4j.PatternLayout log4j.appender.A1.layout.ConversionPattern=%p [%t] %c{2} (%M:%L) - %m%n
# Set the level of the logger named "org.apache.log4j.examples" to # Level.INFO, attach appender A2. log4j.logger.org.apache.log4j.examples=INFO, A2
# Appender A2 writes to the file "test" in user's home. log4j.appender.A2=org.apache.log4j.FileAppender log4j.appender.A2.File=${user.home}/test
# Truncate 'test' if it aleady exists. log4j.appender.A2.Append=false
# Appender A2 uses the PatternLayout. log4j.appender.A2.layout=org.apache.log4j.PatternLayout log4j.appender.A2.layout.ConversionPattern=%5r %-5p [%t] %c{2} - %m%n
1.1 logging-log4j/examples/src/sort/Sort.java
Index: Sort.java =================================================================== package sort;
import org.apache.log4j.PropertyConfigurator; import org.apache.log4j.Logger;
/** Example code for log4j to viewed in conjunction with the [EMAIL PROTECTED] examples.SortAlgo SortAlgo} class.
<p>This program expects a configuration file name as its first argument, and the size of the array to sort as the second and last argument. See its <b><a href="doc-files/Sort.java">source code</a></b> for more details.
<p>Play around with different values in the configuration file and watch the changing behavior.
<p>Example configuration files can be found in <a
href="doc-files/sort1.properties">sort1.properties</a>, <a
href="doc-files/sort2.properties">sort2.properties</a>, <a
href="doc-files/sort3.properties">sort3.properties</a> and <a
href="doc-files/sort4.properties">sort4.properties</a> are supplied with the
package.
<p>If you are also interested in logging performance, then have look at the [EMAIL PROTECTED] org.apache.log4j.performance.Logging} class.
@author Ceki Gülcü */
public class Sort {
static Logger logger = Logger.getLogger(Sort.class.getName());
public static void main(String[] args) { if(args.length != 2) { usage("Incorrect number of parameters."); } int arraySize = -1; try { arraySize = Integer.valueOf(args[1]).intValue(); if(arraySize <= 0) usage("Negative array size."); } catch(java.lang.NumberFormatException e) { usage("Could not number format ["+args[1]+"]."); }
PropertyConfigurator.configure(args[0]);
int[] intArray = new int[arraySize];
logger.info("Populating an array of " + arraySize + " elements in" + " reverse order."); for(int i = arraySize -1 ; i >= 0; i--) { intArray[i] = arraySize - i - 1; }
SortAlgo sa1 = new SortAlgo(intArray); sa1.bubbleSort(); sa1.dump();
// We intentionally initilize sa2 with null. SortAlgo sa2 = new SortAlgo(null); logger.info("The next log statement should be an error message."); sa2.dump(); logger.info("Exiting main method."); }
static void usage(String errMsg) { System.err.println(errMsg); System.err.println("\nUsage: java org.apache.examples.Sort " + "configFile ARRAY_SIZE\n"+ "where configFile is a configuration file\n"+ " ARRAY_SIZE is a positive integer.\n"); System.exit(1); } }
1.1 logging-log4j/examples/src/sort/sort1.properties
Index: sort1.properties =================================================================== # An example log4j configuration file that outputs to System.out. The # output information consists of relative time, log level, thread # name, logger name, nested diagnostic context and the message in that # order.
# For the general syntax of property based configuration files see the # documenation of org.apache.log4j.PropertyConfigurator.
log4j.rootLogger=DEBUG, A1
# A1 is set to be a ConsoleAppender which outputs to System.out. log4j.appender.A1=org.apache.log4j.ConsoleAppender
# A1 uses PatternLayout. log4j.appender.A1.layout=org.apache.log4j.PatternLayout
# The conversion pattern uses format specifiers. You might want to # change the pattern an watch the output format change. log4j.appender.A1.layout.ConversionPattern=%-4r %-5p [%t] %37c %3x - %m%n
# In this example, we are not really interested in INNER loop or SWAP # messages. See the effects of uncommenting and changing the levels of # the following loggers. # log4j.logger.org.apache.log4j.examples.SortAlgo.INNER=WARN # log4j.logger.org.apache.log4j.examples.SortAlgo.SWAP=WARN
1.1 logging-log4j/examples/src/sort/sort3.properties
Index: sort3.properties =================================================================== # An example log4j configuration file that directs its logging output # to a SocketAppender. The SocketAppender is configuted to send its # output to a server running on the localhost port number 12345.
# To test this example, you must start a log4j server with the command
#
#
# java org.apache.log4j.net.SocketServer 12345 configurationFile directory/
#
#
# For the general syntax of property based configuration files see # the documenation of org.apache.log4j.PropertyConfigurator.
# The root logger uses the appender called A1.
log4j.rootLogger=DEBUG, A1
# A1 is set to be a SocketAppender sending its output to the server running on the local host, port 12345.
log4j.appender.A1=org.apache.log4j.net.SocketAppender log4j.appender.A1.Port=12345 log4j.appender.A1.RemoteHost=localhost
# In this example, we are not interested in INNER loop or SWAP # messages. You might try to set INNER and SWAP to DEBUG for more # verbose output.
log4j.logger.org.apache.log4j.examples.SortAlgo.INNER=INFO log4j.logger.org.apache.log4j.examples.SortAlgo.SWAP=INFO
1.1 logging-log4j/examples/src/sort/sort2.properties
Index: sort2.properties =================================================================== # An example log4j configuration file that outputs both to System.out # and a file named 'test'.
# For the general syntax of property based configuration files see the # documenation of org.apache.log4j.PropertyConfigurator.
# WARNING: Location information can be useful but is very costly in # terms of computation.
# The root logger uses the appender called A1.
# The root logger uses the appenders called A1 and A2. Since no level # is specified, note the empty string between the comma (",") and the # equals sign ("="), the level of the root logger remains # untouched. Log4j always initializes the level for the root logger to # DEBUG. The root logger is the only logger that has a default # level. Bu default, all other loggers do not have an assigned level, # such that they inherit their level instead.
log4j.rootLogger=, A1, A2
# A1 is set to be ConsoleAppender sending its output to System.out log4j.appender.A1=org.apache.log4j.ConsoleAppender
# A1 uses PatternLayout. log4j.appender.A1.layout=org.apache.log4j.PatternLayout
# The conversion pattern consists of date in ISO8601 format, level, # thread name, logger name truncated to its rightmost two components # and left justified to 17 characters, location information consisting # of file name (padded to 13 characters) and line number, nested # diagnostic context, the and the application supplied message
log4j.appender.A1.layout.ConversionPattern=%d %-5p [%t] %-17c{2} (%13F:%L) %3x - %m%n
# Appender A2 writes to the file "test". log4j.appender.A2=org.apache.log4j.FileAppender log4j.appender.A2.File=test
# Truncate 'test' if it aleady exists. log4j.appender.A2.Append=false
# Appender A2 uses the PatternLayout. log4j.appender.A2.layout=org.apache.log4j.PatternLayout log4j.appender.A2.layout.ConversionPattern=%-5r %-5p [%t] %c{2} - %m%n
# In this example, we are not interested in INNER loop or SWAP # messages. You might try to set INNER and SWAP to DEBUG for more # verbose output.
log4j.logger.org.apache.log4j.examples.SortAlgo.INNER=INFO log4j.logger.org.apache.log4j.examples.SortAlgo.SWAP=INFO
1.1 logging-log4j/examples/src/sort/SortAlgo.java
Index: SortAlgo.java =================================================================== package sort;
import org.apache.log4j.Category; import org.apache.log4j.NDC;
/** Example code for log4j to viewed in conjunction with the [EMAIL PROTECTED] examples.Sort Sort} class.
<p>SortAlgo uses the bubble sort algorithm to sort an integer array. See also its <b><a href="doc-files/SortAlgo.java">source code</a></b>.
@author Ceki Gülcü */ public class SortAlgo {
final static String className = SortAlgo.class.getName(); final static Category CAT = Category.getInstance(className); final static Category OUTER = Category.getInstance(className + ".OUTER"); final static Category INNER = Category.getInstance(className + ".INNER"); final static Category DUMP = Category.getInstance(className + ".DUMP"); final static Category SWAP = Category.getInstance(className + ".SWAP");
int[] intArray;
SortAlgo(int[] intArray) { this.intArray = intArray; }
void bubbleSort() { CAT.info( "Entered the sort method.");
for(int i = intArray.length -1; i >= 0 ; i--) { NDC.push("i=" + i); OUTER.debug("in outer loop."); for(int j = 0; j < i; j++) { NDC.push("j=" + j); // It is poor practice to ship code with log staments in tight loops. // We do it anyway in this example. INNER.debug( "in inner loop."); if(intArray[j] > intArray[j+1]) swap(j, j+1); NDC.pop(); } NDC.pop(); } }
void dump() { if(! (this.intArray instanceof int[])) { DUMP.error("Tried to dump an uninitialized array."); return; } DUMP.info("Dump of integer array:"); for(int i = 0; i < this.intArray.length; i++) { DUMP.info("Element [" + i + "]=" + this.intArray[i]); } }
void swap(int l, int r) { // It is poor practice to ship code with log staments in tight // loops or code called potentially millions of times. SWAP.debug( "Swapping intArray["+l+"]=" + intArray[l] + " and intArray["+r+"]=" + intArray[r]); int temp = this.intArray[l]; this.intArray[l] = this.intArray[r]; this.intArray[r] = temp; } }
-- Ceki Gülcü
For log4j documentation consider "The complete log4j manual"
ISBN: 2970036908 http://www.qos.ch/shop/products/clm_t.jsp
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