SSDM-3131 openBIS: Improve e-mail notification for admin

SVN: 35692

common/source/java/ch/systemsx/cisd/common/logging/BundledTimestampTriggeringEventEvaluator.java

+/*
+ * Copyright 2007 ETH Zuerich, CISD
+ *
+ * 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.
+ */
+
+package ch.systemsx.cisd.common.logging;
+
+import java.util.Date;
+
+import org.apache.log4j.spi.LoggingEvent;
+import org.apache.log4j.spi.TriggeringEventEvaluator;
+
+/**
+ * A {@link BundledTimestampTriggeringEventEvaluator} that triggers every 10 minutes. Can be used, e.g. to make the
+ * {@link org.apache.log4j.net.SMTPAppender} send email also on non-error conditions.;
+ * 
+ * @author Althea Parker
+ */
+public class BundledTimestampTriggeringEventEvaluator implements TriggeringEventEvaluator
+{
+
+	private long timestamp;
+	
+	public static long timePeriod = 10 * 60000;
+
+    public BundledTimestampTriggeringEventEvaluator() { 
+    	timestamp = new Date().getTime();
+    } 
+	
+    @Override
+    public boolean isTriggeringEvent(LoggingEvent event) { 
+    	long current_time = new Date().getTime();
+    	if (current_time >= timestamp + timePeriod) { 
+    		timestamp = current_time; 
+    		return true; 
+    	} 
+    	else { 
+    		return false; 
+    	} 
+    } 
+	
+}