/**
* Sends a blocking FCP message to the WoT plugin, checks whether the reply is really the expected
* reply message and throws an exception if not. Also checks whether the reply is an error message
* and throws an exception if it is. Therefore, the purpose of this function is that the callee
* can assume that no errors occurred if no exception is thrown.
*
* @param params The params of the FCP message.
* @param expectedReplyMessage The excepted content of the "Message" field of the SimpleFieldSet
* of the reply message.
* @return The unmodified HashResult object which was returned by the PluginTalker.
* @throws WoTDisconnectedException If the connection to WoT was lost.
* @throws Exception If the WoT plugin replied with an error message or not with the expected
* message.
*/
private PluginTalkerBlocking.Result sendFCPMessageBlocking(
SimpleFieldSet params, Bucket data, String expectedReplyMessage) throws Exception {
if (mTalker == null) throw new WoTDisconnectedException();
PluginTalkerBlocking.Result result;
try {
result = mTalker.sendBlocking(params, data);
} catch (PluginNotFoundException e) {
throw new WoTDisconnectedException();
}
if (result.params.get("Message").equals("Error")) {
final String description = result.params.get("Description");
if (description.indexOf("UnknownIdentityException") >= 0)
throw new NoSuchIdentityException(description);
throw new Exception(
"FCP message " + result.params.get("OriginalMessage") + " failed: " + description);
}
if (result.params.get("Message").equals(expectedReplyMessage) == false)
throw new Exception(
"FCP message "
+ params.get("Message")
+ " received unexpected reply: "
+ result.params.get("Message"));
return result;
}
private synchronized boolean connectToWoT() {
if (mTalker != null) {
/* Old connection exists */
SimpleFieldSet sfs = new SimpleFieldSet(true);
sfs.putOverwrite("Message", "Ping");
try {
mTalker.sendBlocking(sfs, null); /* Verify that the old connection is still alive */
return true;
} catch (PluginNotFoundException e) {
mTalker = null;
/* Do not return, try to reconnect in next try{} block */
}
}
try {
mTalker = new PluginTalkerBlocking(mFreetalk.getPluginRespirator());
mFreetalk.handleWotConnected();
return true;
} catch (PluginNotFoundException e) {
mFreetalk.handleWotDisconnected();
return false;
}
}
