change log level at runtime

src/main/java/com/commafeed/backend/StartupBean.java

@@ -72,10 +72,12 @@ public class StartupBean {
 
 	@PostConstruct
 	private void init() {
+
 		startupTime = Calendar.getInstance().getTimeInMillis();
 		if (userDAO.getCount() == 0) {
 			initialData();
 		}
+		applicationSettingsService.applyLogLevel();
 
 		initSupportedLanguages();
 

src/main/java/com/commafeed/backend/model/ApplicationSettings.java

@@ -7,6 +7,8 @@ import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.apache.log4j.Level;
+
 @Entity
 @Table(name = "APPLICATIONSETTINGS")
 @SuppressWarnings("serial")
@@ -29,6 +31,7 @@ public class ApplicationSettings extends AbstractModel {
 	private boolean heavyLoad;
 	private boolean pubsubhubbub;
 	private boolean feedbackButton = true;
+	private String logLevel = Level.INFO.toString();
 
 	@Column(length = 255)
 	private String announcement;
@@ -162,4 +165,12 @@ public class ApplicationSettings extends AbstractModel {
 		this.databaseUpdateThreads = databaseUpdateThreads;
 	}
 
+	public String getLogLevel() {
+		return logLevel;
+	}
+
+	public void setLogLevel(String logLevel) {
+		this.logLevel = logLevel;
+	}
+
 }

src/main/java/com/commafeed/backend/services/ApplicationSettingsService.java

@@ -1,8 +1,14 @@
 package com.commafeed.backend.services;
 
+import java.util.Enumeration;
+
 import javax.ejb.Singleton;
 import javax.inject.Inject;
 
+import org.apache.log4j.Level;
+import org.apache.log4j.LogManager;
+import org.apache.log4j.Logger;
+
 import com.commafeed.backend.dao.ApplicationSettingsDAO;
 import com.commafeed.backend.model.ApplicationSettings;
 import com.google.common.collect.Iterables;
@@ -18,6 +24,7 @@ public class ApplicationSettingsService {
 	public void save(ApplicationSettings settings) {
 		this.settings = settings;
 		applicationSettingsDAO.saveOrUpdate(settings);
+		applyLogLevel();
 	}
 
 	public ApplicationSettings get() {
@@ -28,4 +35,17 @@ public class ApplicationSettingsService {
 		return settings;
 	}
 
+	@SuppressWarnings("unchecked")
+	public void applyLogLevel() {
+		String logLevel = get().getLogLevel();
+		Level level = Level.toLevel(logLevel);
+
+		Enumeration<Logger> loggers = LogManager.getCurrentLoggers();
+		while (loggers.hasMoreElements()) {
+			Logger logger = loggers.nextElement();
+			if (logger.getName().startsWith("com.commafeed")) {
+				logger.setLevel(level);
+			}
+		}
+	}
 }

src/main/webapp/templates/admin.settings.html

@@ -137,6 +137,13 @@
 							<input type="checkbox" name="pubsubhubbub" ng-model="settings.pubsubhubbub" />
 						</div>
 					</div>
+					<div class="control-group">
+						<label class="control-label" for="logLevel">Logging level</label>
+						<div class="controls">
+							<select name="logLevel" ng-model="settings.logLevel" ng-options="level for level in ['DEBUG', 'INFO', 'WARN', 'ERROR']">
+							</select>
+						</div>
+					</div>
 				</div>
 			</div>
 			<div class="control-group">