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2010-06-01T07:07:31Z

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в 18:01, 31 мая 2010

2010-05-31T18:01:46Z

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== Console Log System ==



<source lang="java">

import org.apache.velocity.runtime.RuntimeServices;
import org.apache.velocity.runtime.log.LogSystem;
public class ConsoleLogSystem implements LogSystem {
private RuntimeServices rs;
private int maxLevel = LogSystem.INFO_ID;
private static final String[] LEVEL_NAMES = new String[] { "ERROR", "WARN",
"INFO", "DEBUG" };
private static final int[] LEVELS = new int[] { LogSystem.ERROR_ID,
LogSystem.WARN_ID, LogSystem.INFO_ID, LogSystem.DEBUG_ID };
public void init(RuntimeServices rs) throws Exception {
System.out.println("ConsoleLogSystem.init() called");
this.rs = rs;
configure();
}
public void logVelocityMessage(int level, String message) {
if (level >= maxLevel) {
System.out.println("[" + getLevelName(level) + "] " + message);
}
}
private void configure() {
String maxLevelName = rs.getString("console.logsystem.max.level");
int level = getLevelFromString(maxLevelName);
if (level > -1) {
System.out.println("Using log level: " + maxLevelName);
maxLevel = level;
}
}
private int getLevelFromString(String levelName) {
for (int x = 0; x < LEVEL_NAMES.length; x++) {
if (LEVEL_NAMES[x].equals(levelName)) {
return LEVELS[x];
}
}
// should not arrive here, couldn"t find the level
return -1;
}
private String getLevelName(int level) {
for (int x = 0; x < LEVELS.length; x++) {
if (LEVELS[x] == level) {
return LEVEL_NAMES[x];
}
}
return "UNKNOWN";
}
}

</source>



== Custom log for Velocity ==



<source lang="java">
/*
* Copyright 2000-2001,2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

import org.apache.velocity.app.Velocity;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.Template;
import org.apache.velocity.exception.ParseErrorException;
import org.apache.velocity.exception.ResourceNotFoundException;
import java.io.*;
import java.util.ArrayList;
/**
* This class is a simple demonstration of how the Velocity Template Engine
* can be used in a standalone application.
*
* @author

== How to use an existing Log4j Category as the Velocity logging target ==



<source lang="java">
/*
* Copyright 2000-2001,2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.Category;
import org.apache.velocity.app.VelocityEngine;
import org.apache.velocity.runtime.RuntimeConstants;

/**
* Simple example class to show how to use an existing Log4j Categeory
* as the Velocity logging target.
*
* @author

== This is a toy demonstration of how Velocity can use an externally configured logger ==



<source lang="java">
/*
* Copyright 2000-2001,2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import org.apache.velocity.app.Velocity;
import org.apache.velocity.runtime.log.LogSystem;
import org.apache.velocity.runtime.RuntimeServices;

/**
* This is a toy demonstration of how Velocity
* can use an externally configured logger. In
* this example, the class using Velocity
* implements Velocity"s logger interface, and
* all Velocity log messages are funneled back
* through it.
*
* @author

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Admin: 1 версия

в 18:01, 31 мая 2010