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package events.internal;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.lang.reflect.Field;
import java.util.ArrayList;
import core.VSAbstractProcess;
import core.VSInternalProcess;
import events.VSRegisteredEvents;
import protocols.VSAbstractProtocol;
import serialize.VSNotSerializable;
import serialize.VSSerialize;
/**
* The class VSProtocolScheduleEvent, this event is used if a protocol (which
* is a subclass of VSAbstractProtocol) reschedules itself to run again on a
* specific time.
*
* @author Paul C. Buetow
*/
public class VSProtocolScheduleEvent extends VSAbstractInternalEvent
implements VSNotSerializable {
/** The event is a server protocol schedule. */
private boolean isServerSchedule; /* true = server, false = client */
/** The reference to the protocol object to schedule. */
private VSAbstractProtocol protocol;
/**
* Create a VSProtocolScheduleEvent object for deserialization.
*/
public VSProtocolScheduleEvent() {
}
/**
* Create a VSProtocolScheduleEvent object
*
* @param protocol the protocol
* @param isServerSchedule the event is a client protocol schedule if
* false, else server schedule
*/
public VSProtocolScheduleEvent(VSAbstractProtocol protocol,
boolean isServerSchedule) {
this.protocol = protocol;
this.isServerSchedule = isServerSchedule;
}
/* (non-Javadoc)
* @see events.VSAbstractEvent#onInit()
*/
public void onInit() {
setClassname(getClass().toString());
setShortname(createShortname(null));
}
/**
* Sets if it is client protocol schedule.
*
* @param isServerSchedule false, if the event is a client protocol
* schedule. true, if server.
*/
public void isServerSchedule(boolean isServerSchedule) {
this.isServerSchedule = isServerSchedule;
}
/**
* Sets if it is client protocol schedule.
*
* @return false, if the event is a client protocol schedule. true, if
* server.
*/
public boolean isServerSchedule() {
return isServerSchedule;
}
/**
* Sets the protocol.
*
* @param protocol the protocol
*/
public void setProtocol(VSAbstractProtocol protocol) {
this.protocol = protocol;
}
/**
* Gets the protocol.
*
* @return the protocol
*/
public VSAbstractProtocol getProtocol() {
return protocol;
}
/* (non-Javadoc)
* @see events.VSAbstractEvent#onStart()
*/
public void onStart() {
if (protocol == null) {
protocol = resolveProtocolFromProcess();
}
if (protocol == null) {
return;
}
if (isServerSchedule)
protocol.onServerScheduleStart();
else
protocol.onClientScheduleStart();
}
/* (non-Javadoc)
* @see serialize.VSSerializable#serialize(serialize.VSSerialize,
* java.io.ObjectOutputStream)
*/
public synchronized void serialize(VSSerialize serialize,
ObjectOutputStream objectOutputStream)
throws IOException {
super.serialize(serialize, objectOutputStream);
/** For later backwards compatibility, to add more stuff */
objectOutputStream.writeObject(Boolean.valueOf(false));
/** For later backwards compatibility, to add more stuff */
objectOutputStream.writeObject(Boolean.valueOf(false));
}
/* (non-Javadoc)
* @see serialize.VSSerializable#deserialize(serialize.VSSerialize,
* java.io.ObjectInputStream)
*/
public synchronized void deserialize(VSSerialize serialize,
ObjectInputStream objectInputStream)
throws IOException, ClassNotFoundException {
super.deserialize(serialize, objectInputStream);
if (VSSerialize.DEBUG)
System.out.println("Deserializing: VSProtocolEvent");
/** For later backwards compatibility, to add more stuff */
objectInputStream.readObject();
/** For later backwards compatibility, to add more stuff */
objectInputStream.readObject();
}
protected String createShortname(String savedShortname) {
if (prefs == null) {
return savedShortname != null
? savedShortname
: "Protocol Schedule";
}
if (protocol == null || protocol.getClassname() == null) {
return prefs.getString("lang.events.internal.VSProtocolScheduleEvent.short");
}
String protocolShortname =
VSRegisteredEvents.getShortnameByClassname(protocol.getClassname());
if (protocolShortname == null)
protocolShortname = protocol.getClassname();
return protocolShortname + " "
+ (isServerSchedule
? prefs.getString("lang.server")
: prefs.getString("lang.client"))
+ " "
+ prefs.getString("lang.events.internal.VSProtocolScheduleEvent.short");
}
@SuppressWarnings("unchecked")
private VSAbstractProtocol resolveProtocolFromProcess() {
if (!(process instanceof VSInternalProcess internalProcess)) {
return null;
}
try {
VSAbstractProtocol raftProtocol =
internalProcess.getProtocolObject(
"protocols.implementations.VSRaftProtocol");
if (raftProtocol != null) {
return raftProtocol;
}
Field field = VSAbstractProcess.class.getDeclaredField("protocolsToReset");
field.setAccessible(true);
ArrayList<VSAbstractProtocol> protocols =
(ArrayList<VSAbstractProtocol>) field.get(internalProcess);
if (protocols == null || protocols.isEmpty()) {
return null;
}
VSAbstractProtocol activeProtocol = null;
for (VSAbstractProtocol candidate : protocols) {
if (candidate == null) {
continue;
}
if ("protocols.implementations.VSRaftProtocol".equals(
candidate.getClassname())) {
return candidate;
}
if (activeProtocol == null &&
(candidate.isServer() || candidate.isClient())) {
activeProtocol = candidate;
}
}
if (activeProtocol != null) {
return activeProtocol;
}
return protocols.get(0);
} catch (ReflectiveOperationException e) {
return null;
}
}
}
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