software.amazon.awssdk.services.cloudwatchlogs.model.InputLogEvent Java Examples

/**
 * Tests that we have deserialized the exception response correctly. See TT0064111680
 */
@Test
public void putLogEvents_InvalidSequenceNumber_HasExpectedSequenceNumberInException() {
    // First call to PutLogEvents does not need a sequence number, subsequent calls do
    awsLogs.putLogEvents(PutLogEventsRequest.builder()
                                            .logGroupName(logGroupName)
                                            .logStreamName(logStreamName)
                                            .logEvents(InputLogEvent.builder().message(LOG_MESSAGE).timestamp(LOG_MESSAGE_TIMESTAMP).build())
                                            .build());
    try {
        // This call requires a sequence number, if we provide an invalid one the service should
        // throw an exception with the expected sequence number
        awsLogs.putLogEvents(
                PutLogEventsRequest.builder()
                                   .logGroupName(logGroupName)
                                   .logStreamName(logStreamName)
                                   .logEvents(InputLogEvent.builder().message(LOG_MESSAGE).timestamp(LOG_MESSAGE_TIMESTAMP).build())
                                   .sequenceToken("invalid")
                                   .build());
    } catch (InvalidSequenceTokenException e) {
        assertNotNull(e.expectedSequenceToken());
    }
}
 

public static void putCWLogEvents(CloudWatchLogsClient logsClient, String regionId, String logGroupName, String streamName) {


        // A sequence token is required to put a log event in an existing stream.
        // Look up the stream to find its sequence token.

        // First describe all streams in the log group.
        DescribeLogStreamsRequest logStreamRequest = DescribeLogStreamsRequest.builder()
                .logGroupName(logGroupName)
                .logStreamNamePrefix(streamName)
                .build();
        DescribeLogStreamsResponse describeLogStreamsResponse = logsClient.describeLogStreams(logStreamRequest);

        // Assume that a single stream is returned because a specific stream name was specified in the previous request.
        String sequenceToken = describeLogStreamsResponse.logStreams().get(0).uploadSequenceToken();

        // Build an input log message to put to CloudWatch.
        InputLogEvent inputLogEvent = InputLogEvent.builder()
                .message("{ \"key1\": \"value1\", \"key2\": \"value2\" }")
                .timestamp(System.currentTimeMillis())
                .build();

        // Specify the request parameters.
        PutLogEventsRequest putLogEventsRequest = PutLogEventsRequest.builder()
                .logEvents(Arrays.asList(inputLogEvent))
                .logGroupName(logGroupName)
                .logStreamName(streamName)
                // Sequence token is required so that the log can be written to the
                // latest location in the stream.
                .sequenceToken(sequenceToken)
                .build();
        logsClient.putLogEvents(putLogEventsRequest);
        // snippet-end:[cloudwatch.java2.put_log_events.main]

        System.out.println("Successfully put CloudWatch log event");
    }
 

/**
 * Test uploading and retrieving log events.
 */
@Test
public void testEventsLogging() {
    // No log event is expected in the newly created log stream
    GetLogEventsResponse getResult = awsLogs.getLogEvents(GetLogEventsRequest.builder().logGroupName(logGroupName).logStreamName(logStreamName).build());
    Assert.assertTrue(getResult.events().isEmpty());

    // Insert a new log event
    PutLogEventsRequest request = PutLogEventsRequest.builder()
                                                     .logGroupName(logGroupName)
                                                     .logStreamName(logStreamName)
                                                     .logEvents(InputLogEvent.builder()
                                                                             .message(LOG_MESSAGE)
                                                                             .timestamp(LOG_MESSAGE_TIMESTAMP)
                                                                             .build())
                                                     .build();
    PutLogEventsResponse putResult = awsLogs.putLogEvents(request);

    Assert.assertNotNull(putResult.nextSequenceToken());

    // The new log event is not instantly available in GetLogEvents operation.
    try {
        Thread.sleep(5000);
    } catch (InterruptedException ignored) {
        // Ignored or expected.
    }

    // Pull the event from the log stream
    getResult = awsLogs.getLogEvents(GetLogEventsRequest.builder().logGroupName(logGroupName).logStreamName(logStreamName).build());
    Assert.assertEquals(1, getResult.events().size());
    Assert.assertNotNull(getResult.nextBackwardToken());
    Assert.assertNotNull(getResult.nextForwardToken());

    OutputLogEvent event = getResult.events().get(0);
    Assert.assertEquals(LOG_MESSAGE, event.message());
    Assert.assertEquals(LOG_MESSAGE_TIMESTAMP, event.timestamp().longValue());

    // Use DescribeLogStreams API to verify that the new log event has
    // updated the following parameters of the log stream.
    final LogStream stream = findLogStreamByName(awsLogs, logGroupName, logStreamName);
    Assert.assertEquals(LOG_MESSAGE_TIMESTAMP, stream.firstEventTimestamp().longValue());
    Assert.assertEquals(LOG_MESSAGE_TIMESTAMP, stream.lastEventTimestamp().longValue());
    Assert.assertNotNull(stream.lastIngestionTime());
}