/**
* Return the X-Weave-Timestamp header from <code>response</code>, or the current time if it is
* missing.
*
* <p><b>Warning:</b> this can cause the timestamp of <code>response</code> to cross domains (from
* server clock to local clock), which could cause records to be skipped on account of clock
* drift. This should never happen, because <i>every</i> server response should have a well-formed
* X-Weave-Timestamp header.
*
* @param response The <code>SyncStorageResponse</code> to interrogate.
* @return Normalized timestamp in milliseconds.
*/
public static long getNormalizedTimestamp(SyncStorageResponse response) {
long normalizedTimestamp = -1;
try {
normalizedTimestamp = response.normalizedWeaveTimestamp();
} catch (NumberFormatException e) {
Logger.warn(LOG_TAG, "Malformed X-Weave-Timestamp header received.", e);
}
if (-1 == normalizedTimestamp) {
Logger.warn(
LOG_TAG,
"Computing stand-in timestamp from local clock. Clock drift could cause records to be skipped.");
normalizedTimestamp = System.currentTimeMillis();
}
return normalizedTimestamp;
}
@Override
public void handleRequestSuccess(SyncStorageResponse response) {
Logger.trace(LOG_TAG, "POST of " + outgoing.size() + " records done.");
ExtendedJSONObject body;
try {
body = response.jsonObjectBody(); // jsonObjectBody() throws or returns non-null.
} catch (Exception e) {
Logger.error(LOG_TAG, "Got exception parsing POST success body.", e);
this.handleRequestError(e);
return;
}
// Be defensive when logging timestamp.
if (body.containsKey("modified")) {
Long modified = body.getTimestamp("modified");
if (modified != null) {
Logger.trace(
LOG_TAG, "POST request success. Modified timestamp: " + modified.longValue());
} else {
Logger.warn(
LOG_TAG, "POST success body contains malformed 'modified': " + body.toJSONString());
}
} else {
Logger.warn(
LOG_TAG, "POST success body does not contain key 'modified': " + body.toJSONString());
}
try {
JSONArray success = body.getArray("success");
if ((success != null) && (success.size() > 0)) {
Logger.trace(LOG_TAG, "Successful records: " + success.toString());
for (Object o : success) {
try {
delegate.onRecordStoreSucceeded((String) o);
} catch (ClassCastException e) {
Logger.error(LOG_TAG, "Got exception parsing POST success guid.", e);
// Not much to be done.
}
}
long normalizedTimestamp = getNormalizedTimestamp(response);
Logger.trace(LOG_TAG, "Passing back upload X-Weave-Timestamp: " + normalizedTimestamp);
bumpUploadTimestamp(normalizedTimestamp);
}
success = null; // Want to GC this ASAP.
ExtendedJSONObject failed = body.getObject("failed");
if ((failed != null) && (failed.object.size() > 0)) {
Logger.debug(LOG_TAG, "Failed records: " + failed.object.toString());
Exception ex = new Server11RecordPostFailedException();
for (String guid : failed.keySet()) {
delegate.onRecordStoreFailed(ex, guid);
}
}
failed = null; // Want to GC this ASAP.
} catch (UnexpectedJSONException e) {
Logger.error(LOG_TAG, "Got exception processing success/failed in POST success body.", e);
// TODO
return;
}
Logger.debug(LOG_TAG, "POST of " + outgoing.size() + " records handled.");
}