--- /dev/null
+/*
+ * Copyright 2005-2011 the original author or authors.
+ *
+ * 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 org.wamblee.xmlrouter.logging;
+
+import java.util.List;
+
+import javax.print.attribute.standard.Destination;
+import javax.xml.transform.dom.DOMSource;
+
+import org.wamblee.xmlrouter.common.Id;
+import org.wamblee.xmlrouter.config.Transformation;
+
+/**
+ * Event logger which is notified of the activities done by the xml router.
+ *
+ * @author Erik Brakkee
+ *
+ */
+public interface EventLogger {
+
+ /**
+ * Called when an event is delivered to a destination.
+ *
+ * @param aDocumentType
+ * Document type.
+ * @param aEventId
+ * Unique id for the original event.
+ * @param aEvent
+ * The event.
+ * @param aSequence
+ * Sequence of transformations performed.
+ * @param aDestination
+ * Id of the destination the event was delivered to.
+ * @param aDestinationName
+ * Destination name.
+ * @param aSuccessFlag
+ * Whether or not event delivery succeeded.
+ */
+ void delivered(String aDocumentType, Id<DOMSource> aEventId,
+ DOMSource aEvent, List<Transformation> aSequence,
+ Id<Destination> aDestination, String aDestinationName,
+ boolean aSuccessFlag);
+
+ /**
+ * Called when an event could not be delivered to any destination.
+ *
+ * @param aEventId
+ * Unique id for the original event.
+ * @param aEvent
+ * Event.
+ */
+ void notDelivered(String aDocumentType, Id<DOMSource> aEventId,
+ DOMSource aEvent);
+}