Each HTTP connection that your client makes results in overhead. To reduce overhead, you can batch multiple API calls together into a single HTTP request.
The main classes of interest are BatchRequest and JsonBatchCallback. The following example shows how to use these classes with service-specific generated libraries:
JsonBatchCallback<Calendar> callback = new JsonBatchCallback<Calendar>() {
public void onSuccess(Calendar calendar, HttpHeaders responseHeaders) {
printCalendar(calendar);
addedCalendarsUsingBatch.add(calendar);
}
public void onFailure(GoogleJsonError e, HttpHeaders responseHeaders) {
System.out.println("Error Message: " + e.getMessage());
}
};
...
Calendar client = Calendar.builder(transport, jsonFactory, credential)
.setApplicationName("BatchExample/1.0").build();
BatchRequest batch = client.batch();
Calendar entry1 = new Calendar().setSummary("Calendar for Testing 1");
client.calendars().insert(entry1).queue(batch, callback);
Calendar entry2 = new Calendar().setSummary("Calendar for Testing 2");
client.calendars().insert(entry2).queue(batch, callback);
batch.execute();
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