hlteoh37 commented on code in PR #1:
URL:
https://github.com/apache/flink-connector-prometheus/pull/1#discussion_r1757525787
##########
flink-connector-prometheus-request-signer-amp/src/main/java/org/apache/flink/connector/prometheus/sink/aws/AWS4SignerForAMP.java:
##########
@@ -0,0 +1,347 @@
+package org.apache.flink.connector.prometheus.sink.aws;
+
+import org.apache.flink.util.StringUtils;
+
+import javax.crypto.Mac;
+import javax.crypto.spec.SecretKeySpec;
+
+import java.io.UnsupportedEncodingException;
+import java.net.URL;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.SimpleTimeZone;
+import java.util.SortedMap;
+import java.util.TreeMap;
+
+/**
+ * Implements Http/1.1 AWS Signature Version 4a request signing for POST
requests to the Amazon
+ * Managed Prometheus service (`aps`).
+ */
+public class AWS4SignerForAMP {
Review Comment:
Also let's make this `@PublicEvolving`
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