static void invalidate(H2ONode h2o, Key key, Value newval, Futures fs) {
assert newval._key != null && key.home();
// Prevent the new Value from being overwritten by Yet Another PUT by
// read-locking it. It's safe to read, but not to over-write, until this
// invalidate completes on the *prior* value.
newval.read_lock(); // block further writes until all invalidates complete
fs.add(RPC.call(h2o, new TaskInvalidateKey(key, newval)));
}
/**
* Description: Here we are making our remote procedure call specifically using Pandora's JSON
* protocol. This will return a JSONObject holding the contents of the results key in the
* response. If an error occurs (ie "stat":"fail") an exception with the message body will be
* thrown. Caution: When debugging, be sure to note that most data that flows through here is time
* sensitive, and if stopped in the wrong places, it will cause "stat":"fail" responses from the
* remote server.
*/
private JSONObject doCall(
String method,
Map<String, Object> json_params,
boolean http_secure_flag,
boolean encrypt,
Map<String, String> opt_url_params)
throws Exception, RPCException, IOException, HttpResponseException {
JSONObject response = null;
JSONObject request = null;
if (json_params != null) {
request = new JSONObject(json_params);
} else {
request = new JSONObject();
}
Map<String, String> url_params = new HashMap<String, String>(standard_url_params);
url_params.put("method", method);
if (opt_url_params != null) {
url_params.putAll(opt_url_params);
}
if (user_auth_token != null) {
request.put("userAuthToken", user_auth_token);
}
if (sync_time != 0) {
request.put("syncTime", calcSync());
}
String request_string = request.toString();
if (encrypt) {
request_string = this.pandoraEncrypt(request_string);
}
String response_string = pandora_rpc.call(url_params, request_string, http_secure_flag);
response = new JSONObject(response_string);
if (response.getString("stat").compareTo("ok") != 0) {
if (response.getString("stat").compareTo("fail") == 0) {
throw new RPCException(response.getInt("code"), response.getString("message"));
} else {
throw new Exception("RPC unknown error. stat: " + response.getString("stat"));
}
}
return response.getJSONObject("result"); // Exception thrown if nonexistent
}