@Override
public synchronized Map<String, Object> getProperties() {
Map<String, Object> properties = new HashMap<String, Object>();
if (channel != null) {
properties.put("Channel name", channel.getChannelName());
properties.put("Connection state", channel.getConnectionState().name());
properties.put("Provider name", channel.getProvider().getProviderName());
if (channel.getConnectionState() == Channel.ConnectionState.CONNECTED) {
properties.put("Remote address", channel.getRemoteAddress());
properties.put("Channel type", channelType.getID());
// properties.put("Read access", channel.getReadAccess());
// properties.put("Write access", channel.getWriteAccess());
}
}
return properties;
}
@Override
public void addReader(ChannelHandlerReadSubscription subscription) {
super.addReader(subscription);
if (!monitorCreated.getAndSet(true)) {
// TODO remove this....
for (int i = 0;
i < 100 && channel.getConnectionState() == ConnectionState.NEVER_CONNECTED;
i++) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
}
}
// TODO optimize fields
channel.createMonitor(this, CreateRequestFactory.createRequest("field()", this));
}
}
@Override
public void write(Object newValue, ChannelWriteCallback callback) {
boolean wasEmpty;
synchronized (writeRequests) {
wasEmpty = writeRequests.isEmpty();
writeRequests.add(new WriteRequest(newValue, callback));
}
if (!channelPutCreated.getAndSet(true)) {
channel.createChannelPut(this, isChannelEnumType ? enumPutPVRequest : standardPutPVRequest);
} else if (wasEmpty) {
doNextWrite();
}
}
@Override
public void channelStateChange(Channel channel, ConnectionState connectionState) {
try {
// introspect
if (connectionState == ConnectionState.CONNECTED) {
channel.getField(this, null);
} else {
processConnection(this);
}
} catch (Exception ex) {
reportExceptionToAllReadersAndWriters(ex);
}
}
/* (non-Javadoc)
* @see org.epics.pvaccess.client.GetFieldRequester#getDone(org.epics.pvdata.pv.Status, org.epics.pvdata.pv.Field)
*/
@Override
public void getDone(Status status, Field field) {
reportStatus("Failed to instrospect channel '" + channel.getChannelName() + "'", status);
if (status.isSuccess()) {
channelType = field;
Field valueField = ((Structure) channelType).getField("value");
if (valueField != null && valueField.getID().equals("enum_t")) {
isChannelEnumType = true;
// TODO could create a monitor just to get value.choices
} else isChannelEnumType = false;
}
processConnection(this);
}
@Override
public void disconnect() {
// Close the channel
try {
channel.destroy();
} finally {
channel = null;
// monitor = null;
monitorCreated.set(false);
channelType = null;
channelPut = null;
channelPutValueField = null;
channelPutCreated.set(false);
}
}
@Override
protected boolean isWriteConnected(PVAChannelHandler channel) {
// NOTE: access-rights not yet supported
final Channel c = channel.getChannel();
return c != null && c.isConnected();
}
@Override
public boolean isConnected(PVAChannelHandler channel) {
final Channel c = channel.getChannel();
return c != null && c.isConnected();
}
@Override
public void channelCreated(Status status, Channel channel) {
reportStatus("Failed to create channel instance '" + channel.getChannelName(), status);
this.channel = channel;
}