Enhance log configurator to avoid ClassNotFoundException

sarxos · May 22, 2013 · 25e2012 · 25e2012
1 parent e9299eb
commit 25e2012
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Showing 3 changed files with 32 additions and 23 deletions.
diff --git a/webcam-capture-drivers/webcam-capture-driver-ipcam/pom.xml b/webcam-capture-drivers/webcam-capture-driver-ipcam/pom.xml
@@ -44,12 +44,6 @@
 			<artifactId>httpmime</artifactId>
 			<version>4.2.3</version>
 		</dependency>
-		<dependency>
-			<groupId>ch.qos.logback</groupId>
-			<artifactId>logback-classic</artifactId>
-			<version>1.0.9</version>
-			<scope>provided</scope>
-		</dependency>
 	</dependencies>
 
 	<build>

diff --git a/...pture-drivers/webcam-capture-driver-ipcam/src/examples/java/JpegDasdingStudioExample.java b/...pture-drivers/webcam-capture-driver-ipcam/src/examples/java/JpegDasdingStudioExample.java
@@ -11,6 +11,7 @@
 import com.github.sarxos.webcam.WebcamPanel;
 import com.github.sarxos.webcam.ds.ipcam.IpCamDriver;
 import com.github.sarxos.webcam.ds.ipcam.IpCamStorage;
+import com.github.sarxos.webcam.log.WebcamLogConfigurator;
 
 
 /**
@@ -40,6 +41,8 @@ public class JpegDasdingStudioExample {
 
 	public static void main(String[] args) throws MalformedURLException {
 
+		WebcamLogConfigurator.configure("src/examples/resources/cameras.xml");
+
 		JFrame f = new JFrame("Dasding Studio Live IP Cameras Demo");
 		f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 		f.setLayout(new GridLayout(0, 3, 1, 1));

diff --git a/webcam-capture/src/main/java/com/github/sarxos/webcam/log/WebcamLogConfigurator.java b/webcam-capture/src/main/java/com/github/sarxos/webcam/log/WebcamLogConfigurator.java
@@ -5,14 +5,11 @@
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
+import java.lang.reflect.Method;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import ch.qos.logback.classic.LoggerContext;
-import ch.qos.logback.classic.joran.JoranConfigurator;
-import ch.qos.logback.core.joran.spi.JoranException;
-
 
 /**
  * Configure loggers.
@@ -33,23 +30,38 @@ public class WebcamLogConfigurator {
 	 */
 	public static void configure(InputStream is) {
 
+		ClassLoader cl = Thread.currentThread().getContextClassLoader();
+
 		try {
-			Class.forName("ch.qos.logback.classic.LoggerContext");
-		} catch (ClassNotFoundException e1) {
-			LOG.error("Cannot configure logger because logback LoggerContext is not available in classpath");
-			return;
-		}
 
-		LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();
-		JoranConfigurator configurator = new JoranConfigurator();
-		configurator.setContext(context);
-		context.reset();
+			String[] names = {
+			"ch.qos.logback.classic.LoggerContext",
+			"ch.qos.logback.classic.joran.JoranConfigurator",
+			"ch.qos.logback.core.Context"
+			};
 
-		try {
-			configurator.doConfigure(is);
-		} catch (JoranException e) {
+			for (String name : names) {
+				Class.forName(name, false, cl);
+			}
+
+			Object context = LoggerFactory.getILoggerFactory();
+
+			Class<?> cfgc = Class.forName("ch.qos.logback.classic.joran.JoranConfigurator");
+			Object configurator = cfgc.newInstance();
+
+			Method setContext = cfgc.getMethod("setContext");
+			setContext.invoke(configurator, context);
+
+			Method reset = context.getClass().getMethod("reset");
+			reset.invoke(context, new Object[0]);
+
+			Method doConfigure = cfgc.getMethod("doConfigure");
+			doConfigure.invoke(configurator, is);
+
+		} catch (ClassNotFoundException e) {
+			System.err.println("WLogC: Logback JAR is missing inc lasspath");
+		} catch (Exception e) {
 			LOG.error("Joran configuration exception", e);
-			e.printStackTrace();
 		}
 	}