![Events Diagram](../assets/images/******@****.***)

Here’s a [sample event listener](https://github.com/square/okhttp/blob/master/samples/guide/src/main/java/okhttp3/recipes/PrintEventsNonConcurrent.java) that prints each event with a timestamp.

```java
class PrintingEventListener extends EventListener {
  private long callStartNanos;

  private void printEvent(String name) {
    long nowNanos = System.nanoTime();
    if (name.equals("callStart")) {

- The Date [functions](https://docs.aws.amazon.com/AmazonS3/latest/dev/s3-glacier-select-sql-reference-date.html) `DATE_ADD`, `DATE_DIFF`, `EXTRACT` and `UTCNOW` along with type conversion using `CAST` to the `TIMESTAMP` data type are currently supported.
- AWS S3's [reserved keywords](https://docs.aws.amazon.com/AmazonS3/latest/dev/s3-glacier-select-sql-reference-keyword-list.html) list is not yet respected.

		"Total number of requests rejected for invalid header", "type")
	apiRejectedTimestampTotalMD = NewCounterMD(apiRejectedTimestampTotal,
		"Total number of requests rejected for invalid timestamp", "type")
	apiRejectedInvalidTotalMD = NewCounterMD(apiRejectedInvalidTotal,
		"Total number of invalid requests", "type")

	apiRequestsWaitingTotalMD = NewGaugeMD(apiRequestsWaitingTotal,

     * This cache is refreshed periodically based on the lastLoadedTime.
     */
    protected volatile String[] dataStoreNames = StringUtil.EMPTY_STRINGS;

    /**
     * Timestamp of the last time data store names were loaded from plugin files.
     * Used to implement a time-based cache refresh mechanism.
     * Volatile to ensure visibility across threads.
     */

        final LogEvent event = Log4jLogEvent.newBuilder()
                .setLoggerName("org.codelibs.fess.test")
                .setLevel(Level.ERROR)
                .setMessage(new SimpleMessage("timestamp test"))
                .setTimeMillis(now)
                .build();
        appender.append(event);
        final List<LogNotificationEvent> events = ComponentUtil.getLogNotificationHelper().drainAll();

        // Add rotation counter and timestamp for key uniqueness (SMB3-style)
        final ByteBuffer saltBuffer = ByteBuffer.wrap(modifiedSessionKey, sessionKey.length, 8);
        saltBuffer.order(java.nio.ByteOrder.LITTLE_ENDIAN);
        saltBuffer.putInt(rotationCount); // Rotation counter
        saltBuffer.putInt((int) (System.currentTimeMillis() / 1000)); // Timestamp for additional uniqueness

            if (params != null) {
                builder.field("hasParams", true);
            } else {
                builder.field("hasParams", false);
            }

            builder.field("timestamp", System.currentTimeMillis());

            // Add array
            builder.startArray("values");
            for (int i = 0; i < 3; i++) {
                builder.value(i);
            }

	User       string    `json:"user"`
	Key        string    `json:"key"`
	QueueDir   string    `json:"queueDir"`
	QueueLimit uint64    `json:"queueLimit"`
}

// RedisAccessEvent holds event log data and timestamp
type RedisAccessEvent struct {
	Event     []event.Event
	EventTime string
}

// Validate RedisArgs fields
func (r RedisArgs) Validate() error {
	if !r.Enable {
		return nil
	}

            }

            public synchronized void reset(long timestamp) {
                requestCount = 0;
                failureCount = 0;
                totalResponseTime = 0;
                minResponseTime = Long.MAX_VALUE;
                maxResponseTime = 0;
                lastUpdateTime = timestamp;
            }

            public long getRequestCount() {

                return "lang,role,label,anchor,virtual_host";
            }

            @Override
            public String getIndexAdminDateFields() {
                return "expires,created,timestamp,last_modified";
            }

            @Override
            public String getIndexAdminIntegerFields() {
                return "";
            }

            @Override