/*
* RHQ Management Platform
* Copyright (C) 2005-2008 Red Hat, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation, and/or the GNU Lesser
* General Public License, version 2.1, also as published by the Free
* Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License and the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* and the GNU Lesser General Public License along with this program;
* if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.rhq.core.domain.event;
import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;
import org.jetbrains.annotations.NotNull;
import org.rhq.core.domain.resource.Resource;
/**
* An event source (e.g. a log file path or an SNMP trap OID) for a specific type of {@link Event} (see
* {@link EventDefinition}) and a specific {@link org.rhq.core.domain.resource.Resource}.
*
* @author Ian Springer
*/
@Entity
@NamedQueries( {
@NamedQuery(name = EventSource.QUERY_DELETE_BY_RESOURCES, query = "DELETE FROM EventSource evs WHERE evs.resource.id IN ( :resourceIds ) "),
@NamedQuery(name = EventSource.QUERY_BY_EVENT_DEFINITION, query = "SELECT evs FROM EventSource evs WHERE evs.eventDefinition = :definition") })
@Table(name = EventSource.TABLE_NAME)
@SequenceGenerator(allocationSize = org.rhq.core.domain.util.Constants.ALLOCATION_SIZE, name = EventSource.TABLE_NAME
+ "_ID_SEQ", sequenceName = EventSource.TABLE_NAME + "_ID_SEQ")
public class EventSource implements Serializable {
private static final long serialVersionUID = 1L;
public static final String TABLE_NAME = "RHQ_EVENT_SOURCE";
public static final String QUERY_DELETE_BY_RESOURCES = "EventSource.deleteByResources";
public static final String QUERY_BY_EVENT_DEFINITION = "EventSource.deletebyEventDefinition";
@Id
@Column(name = "ID", nullable = false)
@GeneratedValue(strategy = GenerationType.AUTO, generator = EventSource.TABLE_NAME + "_ID_SEQ")
private int id;
@JoinColumn(name = "EVENT_DEF_ID", nullable = false)
@ManyToOne
private EventDefinition eventDefinition;
@JoinColumn(name = "RESOURCE_ID", nullable = false)
@ManyToOne(fetch = FetchType.LAZY, optional = false)
private Resource resource;
@Column(name = "RESOURCE_ID", insertable = false, updatable = false)
private int resourceId;
@Column(name = "LOCATION", length = 2000, nullable = false)
private String location;
@OneToMany(mappedBy = "source", cascade = { CascadeType.REMOVE }, fetch = FetchType.LAZY)
private Set<Event> events = new HashSet<Event>();
/* no-arg constructor required by EJB spec and Externalizable (Externalizable also requires it to be public) */
public EventSource() {
}
public EventSource(@NotNull String location, @NotNull EventDefinition eventDefinition, @NotNull Resource resource) {
if (location == null)
throw new IllegalArgumentException("location parameter must not be null.");
if (eventDefinition == null)
throw new IllegalArgumentException("eventDefinition parameter must not be null.");
if (resource == null)
throw new IllegalArgumentException("resource parameter must not be null.");
this.location = location;
this.eventDefinition = eventDefinition;
this.resource = resource;
this.resourceId = this.resource.getId();
}
public int getId() {
return this.id;
}
public EventDefinition getEventDefinition() {
return eventDefinition;
}
public Resource getResource() {
return resource;
}
public int getResourceId() {
return resourceId;
}
@NotNull
public String getLocation() {
return this.location;
}
public Set<Event> getEvents() {
return events;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null || !(obj instanceof EventSource))
return false;
EventSource that = (EventSource) obj;
if (!eventDefinition.equals(that.eventDefinition))
return false;
if (resourceId != that.resourceId)
return false;
if (!location.equals(that.location))
return false;
return true;
}
@Override
public int hashCode() {
int result;
result = eventDefinition.hashCode();
result = 31 * result + resourceId;
result = 31 * result + location.hashCode();
return result;
}
@Override
public String toString() {
return this.getClass().getName().substring(this.getClass().getName().lastIndexOf(".") + 1) + "[" + "id="
+ this.id + ", " + "eventDefinition.name="
+ ((this.eventDefinition != null) ? this.eventDefinition.getName() : "null") + ", " + "resource.name="
+ ((this.resource != null) ? this.resource.getName() : "null") + ", " + "location=" + this.location + "]";
}
}