/**
* Copyright (c) 2004-2011 QOS.ch
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
package org.slf4j.ext;
import java.io.Serializable;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.beans.XMLDecoder;
import java.beans.XMLEncoder;
import java.beans.ExceptionListener;
/**
* Base class for Event Data. Event Data contains data to be logged about an
* event. Users may extend this class for each EventType they want to log.
*
* @author Ralph Goers
*/
public class EventData implements Serializable {
private static final long serialVersionUID = 153270778642103985L;
private Map<String, Object> eventData = new HashMap<String, Object>();
public static final String EVENT_MESSAGE = "EventMessage";
public static final String EVENT_TYPE = "EventType";
public static final String EVENT_DATETIME = "EventDateTime";
public static final String EVENT_ID = "EventId";
/**
* Default Constructor
*/
public EventData() {
}
/**
* Constructor to create event data from a Map.
*
* @param map
* The event data.
*/
public EventData(Map<String, Object> map) {
eventData.putAll(map);
}
/**
* Construct from a serialized form of the Map containing the RequestInfo
* elements
*
* @param xml
* The serialized form of the RequestInfo Map.
*/
@SuppressWarnings("unchecked")
public EventData(String xml) {
ByteArrayInputStream bais = new ByteArrayInputStream(xml.getBytes());
try {
XMLDecoder decoder = new XMLDecoder(bais);
this.eventData = (Map<String, Object>) decoder.readObject();
} catch (Exception e) {
throw new EventException("Error decoding " + xml, e);
}
}
/**
* Serialize all the EventData items into an XML representation.
*
* @return an XML String containing all the EventData items.
*/
public String toXML() {
return toXML(eventData);
}
/**
* Serialize all the EventData items into an XML representation.
*
* @param map the Map to transform
* @return an XML String containing all the EventData items.
*/
public static String toXML(Map<String, Object> map) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
XMLEncoder encoder = new XMLEncoder(baos);
encoder.setExceptionListener(new ExceptionListener() {
public void exceptionThrown(Exception exception) {
exception.printStackTrace();
}
});
encoder.writeObject(map);
encoder.close();
return baos.toString();
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* Retrieve the event identifier.
*
* @return The event identifier
*/
public String getEventId() {
return (String) this.eventData.get(EVENT_ID);
}
/**
* Set the event identifier.
*
* @param eventId
* The event identifier.
*/
public void setEventId(String eventId) {
if (eventId == null) {
throw new IllegalArgumentException("eventId cannot be null");
}
this.eventData.put(EVENT_ID, eventId);
}
/**
* Retrieve the message text associated with this event, if any.
*
* @return The message text associated with this event or null if there is
* none.
*/
public String getMessage() {
return (String) this.eventData.get(EVENT_MESSAGE);
}
/**
* Set the message text associated with this event.
*
* @param message
* The message text.
*/
public void setMessage(String message) {
this.eventData.put(EVENT_MESSAGE, message);
}
/**
* Retrieve the date and time the event occurred.
*
* @return The Date associated with the event.
*/
public Date getEventDateTime() {
return (Date) this.eventData.get(EVENT_DATETIME);
}
/**
* Set the date and time the event occurred in case it is not the same as when
* the event was logged.
*
* @param eventDateTime
* The event Date.
*/
public void setEventDateTime(Date eventDateTime) {
this.eventData.put(EVENT_DATETIME, eventDateTime);
}
/**
* Set the type of event that occurred.
*
* @param eventType
* The type of the event.
*/
public void setEventType(String eventType) {
this.eventData.put(EVENT_TYPE, eventType);
}
/**
* Retrieve the type of the event.
*
* @return The event type.
*/
public String getEventType() {
return (String) this.eventData.get(EVENT_TYPE);
}
/**
* Add arbitrary attributes about the event.
*
* @param name
* The attribute's key.
* @param obj
* The data associated with the key.
*/
public void put(String name, Serializable obj) {
this.eventData.put(name, obj);
}
/**
* Retrieve an event attribute.
*
* @param name
* The attribute's key.
* @return The value associated with the key or null if the key is not
* present.
*/
public Serializable get(String name) {
return (Serializable) this.eventData.get(name);
}
/**
* Populate the event data from a Map.
*
* @param data
* The Map to copy.
*/
public void putAll(Map<String, Object> data) {
this.eventData.putAll(data);
}
/**
* Returns the number of attributes in the EventData.
*
* @return the number of attributes in the EventData.
*/
public int getSize() {
return this.eventData.size();
}
/**
* Returns an Iterator over all the entries in the EventData.
*
* @return an Iterator that can be used to access all the event attributes.
*/
public Iterator<Map.Entry<String, Object>> getEntrySetIterator() {
return this.eventData.entrySet().iterator();
}
/**
* Retrieve all the attributes in the EventData as a Map. Changes to this map
* will be reflected in the EventData.
*
* @return The Map of attributes in this EventData instance.
*/
public Map<String, Object> getEventMap() {
return this.eventData;
}
/**
* Convert the EventData to a String.
*
* @return The EventData as a String.
*/
@Override
public String toString() {
return toXML();
}
/**
* Compare two EventData objects for equality.
*
* @param o
* The Object to compare.
* @return true if the objects are the same instance or contain all the same
* keys and their values.
*/
@SuppressWarnings("unchecked")
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof EventData || o instanceof Map)) {
return false;
}
Map<String, Object> map = (o instanceof EventData) ? ((EventData) o).getEventMap() : (Map<String, Object>) o;
return this.eventData.equals(map);
}
/**
* Compute the hashCode for this EventData instance.
*
* @return The hashcode for this EventData instance.
*/
@Override
public int hashCode() {
return this.eventData.hashCode();
}
}