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added timestamp to logging #2475

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added timestamp to logging #2475

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16 changes: 14 additions & 2 deletions structured-logging/src/main/java/com/google/cloud/teleport/v2/logging/JsonAppender.java
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Original file line number Diff line number Diff line change
Expand Up @@ -20,13 +20,18 @@
import ch.qos.logback.core.CoreConstants;
import ch.qos.logback.core.UnsynchronizedAppenderBase;
import com.google.gson.Gson;
import java.time.Instant;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;

/**
* A simple logging Appender that output logs in Json format. Inspired by
* com.google.cloud.logging.logback.LoggingAppender.
*/
public class JsonAppender extends UnsynchronizedAppenderBase<ILoggingEvent> {
private static final Gson gson = new Gson();
private static final DateTimeFormatter TIMESTAMP_FORMATTER =
DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSSSSSSS'Z'").withZone(ZoneOffset.UTC);

@Override
protected void append(ILoggingEvent event) {
Expand All @@ -38,16 +43,23 @@ protected void append(ILoggingEvent event) {
.append(CoreConstants.LINE_SEPARATOR)
.append(ThrowableProxyUtil.asString(event.getThrowableProxy()));
}
System.err.println(gson.toJson(new JsonEntry(message, event.getLevel().toString())));
System.err.println(
gson.toJson(
new JsonEntry(
message,
event.getLevel().toString(),
TIMESTAMP_FORMATTER.format(Instant.ofEpochMilli(event.getTimeStamp())))));
}

private static final class JsonEntry {
final CharSequence message;
final CharSequence severity;
final CharSequence timestamp;

public JsonEntry(CharSequence message, CharSequence severity) {
public JsonEntry(CharSequence message, CharSequence severity, CharSequence timestamp) {
this.message = message;
this.severity = severity;
this.timestamp = timestamp;
}
}
}
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