Bugfixes for type mappings removal transformations, README + other si…

…mple improvements

Signed-off-by: Greg Schohn <greg.schohn@gmail.com>

TrafficCapture/trafficReplayer/src/main/java/org/opensearch/migrations/replay/HttpByteBufFormatter.java

@@ -197,7 +197,8 @@ public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception
                 } else {
                     content.release();
                 }
-            } else if (msg instanceof HttpMessage) {
+            }
+            if (msg instanceof HttpMessage) { // this & HttpContent are interfaces & 'Full' messages implement both
                 message = (HttpMessage) msg;
             }
             if (msg instanceof LastHttpContent) {
@@ -206,16 +207,16 @@ public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception
                 }
                 var finalMsg = (message instanceof HttpRequest)
                     ? new DefaultFullHttpRequest(message.protocolVersion(),
-                    ((HttpRequest) message).method(),
-                    ((HttpRequest) message).uri(),
-                    aggregatedContents,
-                    message.headers(),
-                    ((LastHttpContent) msg).trailingHeaders())
+                        ((HttpRequest) message).method(),
+                        ((HttpRequest) message).uri(),
+                        aggregatedContents,
+                        message.headers(),
+                        ((LastHttpContent) msg).trailingHeaders())
                     : new DefaultFullHttpResponse(message.protocolVersion(),
-                    ((HttpResponse)message).status(),
-                    aggregatedContents,
-                    message.headers(),
-                    ((LastHttpContent) msg).trailingHeaders());
+                        ((HttpResponse)message).status(),
+                        aggregatedContents,
+                        message.headers(),
+                        ((LastHttpContent) msg).trailingHeaders());
                 super.channelRead(ctx, finalMsg);
             }
         }

TrafficCapture/trafficReplayer/src/main/java/org/opensearch/migrations/replay/ResultsToLogsConsumer.java

@@ -161,6 +161,7 @@ public static String getTransactionSummaryStringPreamble() {
             .add("SOURCE_STATUS_CODE/TARGET_STATUS_CODE...")
             .add("SOURCE_RESPONSE_SIZE_BYTES/TARGET_RESPONSE_SIZE_BYTES...")
             .add("SOURCE_LATENCY_MS/TARGET_LATENCY_MS...")
+            .add("METHOD...")
             .add("URI...")
             .toString();
     }
@@ -219,6 +220,11 @@ public static String toTransactionSummaryString(
                     transformStreamToString(parsed.targetResponseList.stream(),
                         r -> "" + r.get(ParsedHttpMessagesAsDicts.RESPONSE_TIME_MS_KEY))
             )
+            // method
+            .add(
+                parsed.sourceRequestOp
+                    .map(r -> (String) r.get(ParsedHttpMessagesAsDicts.METHOD_KEY))
+                    .orElse(MISSING_STR))
             // uri
             .add(
                 parsed.sourceRequestOp

transformation/transformationPlugins/jsonMessageTransformers/jsonTypeMappingsSanitizationTransformer/README.md

@@ -55,47 +55,71 @@ GET activity/post/_search
 
 ## Routing data to new indices
 
-The structure of the documents and indices need to change.  Some options are to use separate indices, drop some of 
+The structure of the documents and indices need to change.  Options are to use separate indices, drop some of 
 the types to make an index single-purpose, or to create an index that's the union of all the types' fields.
 
-With a simple mapping directive, we can define each of these three behaviors.  The following yaml shows how to map 
-documents into two different indices named users and posts: 
+Specific instances of those behaviors can be expressed via a map (or dictionary) or indices to types to target indices.
+The following sample json shows how to map documents from the 'activity' index into two different indices 
+('users' and 'posts'): 
 ```
-activity:
-  user: new_users
-  post: new_posts
+{
+  "activity": {
+    "user: "new_users",
+    "post": "new_posts"
+   }
 ```
 
-To drop one type, just leave it out:
+To drop the 'post' type, just leave it out:
 ```
-activity:
-  user: only_users
+{
+  "activity": {
+    "user": "only_users"
+  }
+}
 ```
 
-To merge types together, use the same value:
+To merge types into a single index, use the same value:
 ```
-activity:
-  user: any_activity
-  post: any_activity
+{
+  "activity": {
+    "user": "any_activity",
+    "post": "any_activity",
+  }
+}
 ```
 
-Any _indices_ that are NOT specified won't be modified - all additions, changes, and queries on those other indices not
-specified at the root level will remain untouched by the static mapping rewriter.  However, missing types from a 
-specified index will be removed.  To remove ALL the activity for a given index, specify an index with no
-children types.
+To remove ALL the activity for a given index, specify an index with no children types.
 ```
-activity: {}
+{
+  "activity": {}
+}
 ```
 
-In addition to static source/target mappings, users can specify source and type pairs as a regex and use any captured 
-groups in the target index name.  Regex rules take precedent _after_ the static rules and are only applied when there 
-was no index match in the static mappings.  
+Those regex rules take precedence **after** the static mappings specified above.
+
+In addition to static source/target mappings, users can specify source and type pairs as regex patterns and 
+use captured groups in the target index name.  
+Any source _indices_ that are NOT specified in the maps will be processed through the regex route rules.
+The regex rules are only applied if the source index doesn't match a key in the static route map
 
-Regex replacement is controlled via an ordered list of `[indexNamePattern, typeNamePattern, replacementString]`.  
-The transformer will use the replacement for the first matched item found.  
-If none are found, unlike missing indices for static mappings, the system presumes that the index and type are 
-**NOT** to be propagated to the target - any reference to those types and their corresponding data will be suppressed.  
-To preserve all items, a default rule will need to be included.  
+Regex replace rules are evaluated by concatenating the source index and source types into a single string.
+The pattern components are also concatenated into a corresponding match string.
+The replacement value will replace the _matched_ part of the source index + typename and replace it with the
+specified value.
+If that specified value contains (numerical) backreferences, those will pull from the captured groups of the 
+concatenated pattern.  
+The concatenated pattern is the index pattern followed by the type pattern, meaning that the groups in the index are
+numbered from 1 and the type pattern group numbers start after all the groups from the index.
+
+Missing types from a specified index will be removed.
+When the regex pattern isn't defined `["(.*)", "(.*)", "\\1_\\2"]` is used to map each type into its own isolated
+index, preserving all data and its separation.
+
+For more details about regexes, see the [Python](https://docs.python.org/3/library/re.html#re.sub) or 
+[Java](https://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html) documentation.  
+This transform uses python-style backreferences (`'`\1`) for replacement patterns.
+Notice that regexes can NOT be specified in the index-type map.
+They can _only_ be used via the list, which will be evaluated in the order of the list until a match is found.
 
 The following sample shows how indices that start with 'time-' will be migrated and every other index and type not
 already matched will be dropped.
@@ -114,41 +138,18 @@ merging all types into a single index with the same name as the source index.
 ]
 ```
 
-## Final Results
-
-``` 
-PUT any_activity
-{
-    "mappings": {
-      "properties": {
-        "type": {
-          "type": "keyword"
-        },
-        "name": {
-          "type": "text"
-        },
-        "user_name": {
-          "type": "keyword"
-        },
-        "email": {
-          "type": "keyword"
-        },
-        "content": {
-          "type": "text"
-        },
-        "tweeted_at": {
-          "type": "date"
-        }
-      }
-    }
-}
-
-PUT any_activity/_doc/someuser
-{
-  "name": "Some User",
-  "user_name": "user",
-  "email": "user@example.com"
-}
-
+For more examples, compare the following cases.  
+Though note that anything matched by the static maps shown above will block any of these rules from being evaluated.
+
+| Regex Entry                                                                    | Source Index | Source Type | Target Index      | PUT Doc URL                    | Bulk Index Command                                             |
+|--------------------------------------------------------------------------------|-------------|-------------|-------------------|--------------------------------|----------------------------------------------------------------|
+| `[["time-(.*)", "(cpu)", "time-\\1-\\2"]]`                                     | time-nov11  | cpu         | time-nov11-cpu    | /time-nov11-cpu/_doc/doc512    | `{"index": {"_index": "time-nov11-cpu", "_id": "doc512" }}`    |
+| `[["time-(.*)", "(cpu)", "time-\\1-\\2"]]`                                     | logs        | access      | [DELETED]         | [DELETED]                      | [DELETED]                                                      |
+| `[["time-(.*)", "(cpu)", "time-\\1-\\2"],`<br/>` ["(.*)", "(.*)", "\\1-\\2"]]` | logs        | access      | logs_access       | /logs_access/_doc/doc513       | `{"index": {"_index": "logs_access", "_id": "doc513" }}`       |
+| `[["time-(.*)", "(cpu)", "time-\\1-\\2"],`<br/>`[["", ".*", ""]]`              | everything  | widgets     | everything        | /everything/_doc/doc514        | `{"index": {"_index": "everything", "_id": "doc514" }}`        |
+| `[["time-(.*)", "(cpu)", "time-\\1-\\2"],`<br/>`[["", ".*", ""]]`              | everything  | sprockets   | everything        | /everything/_doc/doc515        | `{"index": {"_index": "everything", "_id": "doc515" }}`        |
+| `[["time-(.*)", "(.*)-(cpu)", "\\2-\\3-\\1"]]`                                 | time-nov11  | host123-cpu | host123-cpu-nov11 | /host123-cpu-nov11/_doc/doc512 | `{"index": {"_index": "host123-cpu-nov11", "_id": "doc512" }}` |
+| `[["", ".*", ""]]`                                                             | metadata    | users       | metadata          | /metadata/_doc/doc516          | `{"index": {"_index": "metadata", "_id": "doc516" }}`          |
+| `[[".*", ".*", "leftovers"]]`                                                  | logs        | access      | leftovers         | /leftovers/_doc/doc517         | `{"index": {"_index": "leftovers", "_id": "doc517" }}`         |
+| `[[".*", ".*", "leftovers"]]`                                                  | permissions | access      | leftovers         | /leftovers/_doc/doc517         | `{"index": {"_index": "leftovers", "_id": "doc517" }}`         |
 
-```

transformation/transformationPlugins/jsonMessageTransformers/jsonTypeMappingsSanitizationTransformer/src/main/java/org/opensearch/migrations/transform/TypeMappingsSanitizationTransformer.java

@@ -49,7 +49,7 @@ public TypeMappingsSanitizationTransformer(
         // types of patterns are being used.
         // This regex says, match the type part and reduce it to nothing, leave the index part untouched.
         var regexIndexMappings = Optional.ofNullable(regexIndexMappingsIncoming)
-            .orElseGet(() -> (indexMappingsIncoming == null ? List.of(List.of("", ".*", "")) : List.of()));
+            .orElseGet(() -> (indexMappingsIncoming == null ? List.of(List.of("(.*)", "(.*)", "\\1_\\2")) : List.of()));
 
         return incomingJson -> Map.of("source_document", incomingJson,
             "index_mappings", indexMappings,

transformation/transformationPlugins/jsonMessageTransformers/jsonTypeMappingsSanitizationTransformer/src/main/resources/jinjava/typeMappings/rewriteDocumentRequest.j2

@@ -9,7 +9,7 @@
         {
         "method": "{{ input_map.request.method }}",
         "URI": "/{{ target_index }}/_doc/{{ match.group3 }}",
-        "preserveWhenMissing": ["headers","payload"]
+        "preserveWhenMissing": "*"
         }
     {%-  endif -%}
 {%- endmacro -%}

transformation/transformationPlugins/jsonMessageTransformers/jsonTypeMappingsSanitizationTransformer/src/main/resources/jinjava/typeMappings/rewriteIndexForTarget.j2

@@ -15,10 +15,14 @@
 {%- endmacro -%}
 
 {%- macro convert_source_index_to_target(source_index, source_type, index_mappings, regex_index_mappings) -%}
-    {%- set ns = namespace(target_index=none) -%}
-    {%- set ns.target_index = (index_mappings[source_index] | default({}))[source_type] -%}
-    {%- if ns.target_index is none -%}
-        {%- set ns.target_index = convert_source_index_to_target_via_regex(source_index, source_type, regex_index_mappings) -%}
+    {%- if source_type == "_doc" -%}
+        {{- source_index -}}
+    {%- else -%}
+        {%- set ns = namespace(target_index=none) -%}
+        {%- set ns.target_index = (index_mappings[source_index] | default({}))[source_type] -%}
+        {%- if ns.target_index is none -%}
+            {%- set ns.target_index = convert_source_index_to_target_via_regex(source_index, source_type, regex_index_mappings) -%}
+        {%- endif -%}
+        {{- ns.target_index -}}
     {%- endif -%}
-    {{- ns.target_index -}}
 {%- endmacro -%}

transformation/transformationPlugins/jsonMessageTransformers/jsonTypeMappingsSanitizationTransformer/src/test/java/org/opensearch/migrations/transform/TypeMappingsSanitizationDocBackfillTest.java

@@ -1,7 +1,6 @@
 package org.opensearch.migrations.transform;
 
 import java.util.LinkedHashMap;
-import java.util.List;
 
 import org.opensearch.migrations.testutils.JsonNormalizer;
 
@@ -23,13 +22,12 @@ public void test() throws Exception {
                 "}";
 
         var expectedString = "{\n" +
-            "  \"index\": { \"_index\": \"network\", \"_id\": \"1\" },\n" +
+            "  \"index\": { \"_index\": \"performance_network\", \"_id\": \"1\" },\n" +
             "  \"source\": { \"field1\": \"value1\" }\n" +
             "}";
 
 
-        var regexIndexMappings = List.of(List.of(".*", "", ""));
-        var indexTypeMappingRewriter = new TypeMappingsSanitizationTransformer(null, regexIndexMappings);
+        var indexTypeMappingRewriter = new TypeMappingsSanitizationTransformer(null, null);
         var resultObj = indexTypeMappingRewriter.transformJson(OBJECT_MAPPER.readValue(testString, LinkedHashMap.class));
         log.atInfo().setMessage("resultStr = {}").addArgument(() -> {
             try {