[Backport 2.x] Alerting Enhancements: Alerting Comments (Experimental)

src/main/kotlin/org/opensearch/commons/alerting/action/AlertingActions.kt

@@ -21,6 +21,9 @@ object AlertingActions {
     const val SUBSCRIBE_FINDINGS_ACTION_NAME = "cluster:admin/opensearch/alerting/findings/subscribe"
     const val GET_MONITOR_ACTION_NAME = "cluster:admin/opendistro/alerting/monitor/get"
     const val SEARCH_MONITORS_ACTION_NAME = "cluster:admin/opendistro/alerting/monitor/search"
+    const val INDEX_COMMENT_ACTION_NAME = "cluster:admin/opensearch/alerting/alerts/comments/write"
+    const val SEARCH_COMMENTS_ACTION_NAME = "cluster:admin/opensearch/alerting/alerts/comments/search"
+    const val DELETE_COMMENT_ACTION_NAME = "cluster:admin/opensearch/alerting/alerts/comments/delete"
 
     @JvmField
     val INDEX_MONITOR_ACTION_TYPE =
@@ -73,4 +76,16 @@ object AlertingActions {
     @JvmField
     val SEARCH_MONITORS_ACTION_TYPE =
         ActionType(SEARCH_MONITORS_ACTION_NAME, ::SearchResponse)
+
+    @JvmField
+    val INDEX_COMMENT_ACTION_TYPE =
+        ActionType(INDEX_COMMENT_ACTION_NAME, ::IndexCommentResponse)
+
+    @JvmField
+    val SEARCH_COMMENTS_ACTION_TYPE =
+        ActionType(SEARCH_COMMENTS_ACTION_NAME, ::SearchResponse)
+
+    @JvmField
+    val DELETE_COMMENT_ACTION_TYPE =
+        ActionType(DELETE_COMMENT_ACTION_NAME, ::DeleteCommentResponse)
 }

src/main/kotlin/org/opensearch/commons/alerting/action/DeleteCommentRequest.kt

@@ -0,0 +1,34 @@
+package org.opensearch.commons.alerting.action
+
+import org.opensearch.action.ActionRequest
+import org.opensearch.action.ActionRequestValidationException
+import org.opensearch.core.common.io.stream.StreamInput
+import org.opensearch.core.common.io.stream.StreamOutput
+import java.io.IOException
+
+class DeleteCommentRequest : ActionRequest {
+    val commentId: String
+
+    constructor(commentId: String) : super() {
+        this.commentId = commentId
+    }
+
+    @Throws(IOException::class)
+    constructor(sin: StreamInput) : this(
+        commentId = sin.readString()
+    )
+
+    override fun validate(): ActionRequestValidationException? {
+        if (commentId.isBlank()) {
+            val exception = ActionRequestValidationException()
+            exception.addValidationError("comment id must not be blank")
+            return exception
+        }
+        return null
+    }
+
+    @Throws(IOException::class)
+    override fun writeTo(out: StreamOutput) {
+        out.writeString(commentId)
+    }
+}

src/main/kotlin/org/opensearch/commons/alerting/action/DeleteCommentResponse.kt

@@ -0,0 +1,32 @@
+package org.opensearch.commons.alerting.action
+
+import org.opensearch.commons.alerting.util.IndexUtils
+import org.opensearch.commons.notifications.action.BaseResponse
+import org.opensearch.core.common.io.stream.StreamInput
+import org.opensearch.core.common.io.stream.StreamOutput
+import org.opensearch.core.xcontent.ToXContent
+import org.opensearch.core.xcontent.XContentBuilder
+
+class DeleteCommentResponse : BaseResponse {
+    var commentId: String
+
+    constructor(
+        id: String
+    ) : super() {
+        this.commentId = id
+    }
+
+    constructor(sin: StreamInput) : this(
+        sin.readString() // commentId
+    )
+
+    override fun writeTo(out: StreamOutput) {
+        out.writeString(commentId)
+    }
+
+    override fun toXContent(builder: XContentBuilder, params: ToXContent.Params): XContentBuilder {
+        return builder.startObject()
+            .field(IndexUtils._ID, commentId)
+            .endObject()
+    }
+}

src/main/kotlin/org/opensearch/commons/alerting/action/IndexCommentRequest.kt

@@ -0,0 +1,73 @@
+package org.opensearch.commons.alerting.action
+
+import org.opensearch.action.ActionRequest
+import org.opensearch.action.ActionRequestValidationException
+import org.opensearch.core.common.io.stream.StreamInput
+import org.opensearch.core.common.io.stream.StreamOutput
+import org.opensearch.rest.RestRequest
+import java.io.IOException
+
+/**
+ * Request to index/create a Comment
+ *
+ * entityId: the entity that the Comment is attached to and therefore associated with (e.g. in Alerting,
+ * the entity is an Alert). This field is expected to be non-blank if the request is to create a new Comment.
+ *
+ * commentId: the ID of an existing Comment. This field is expected to be non-blank if the request is to
+ * update an existing Comment.
+ */
+class IndexCommentRequest : ActionRequest {
+    val entityId: String
+    val commentId: String
+    val seqNo: Long
+    val primaryTerm: Long
+    val method: RestRequest.Method
+    var content: String
+
+    constructor(
+        entityId: String,
+        commentId: String,
+        seqNo: Long,
+        primaryTerm: Long,
+        method: RestRequest.Method,
+        content: String
+    ) : super() {
+        this.entityId = entityId
+        this.commentId = commentId
+        this.seqNo = seqNo
+        this.primaryTerm = primaryTerm
+        this.method = method
+        this.content = content
+    }
+
+    @Throws(IOException::class)
+    constructor(sin: StreamInput) : this(
+        entityId = sin.readString(),
+        commentId = sin.readString(),
+        seqNo = sin.readLong(),
+        primaryTerm = sin.readLong(),
+        method = sin.readEnum(RestRequest.Method::class.java),
+        content = sin.readString()
+    )
+
+    override fun validate(): ActionRequestValidationException? {
+        if (method == RestRequest.Method.POST && entityId.isBlank() ||
+            method == RestRequest.Method.PUT && commentId.isBlank()
+        ) {
+            val exception = ActionRequestValidationException()
+            exception.addValidationError("id must not be blank")
+            return exception
+        }
+        return null
+    }
+
+    @Throws(IOException::class)
+    override fun writeTo(out: StreamOutput) {
+        out.writeString(entityId)
+        out.writeString(commentId)
+        out.writeLong(seqNo)
+        out.writeLong(primaryTerm)
+        out.writeEnum(method)
+        out.writeString(content)
+    }
+}

src/main/kotlin/org/opensearch/commons/alerting/action/IndexCommentResponse.kt

@@ -0,0 +1,57 @@
+package org.opensearch.commons.alerting.action
+
+import org.opensearch.commons.alerting.model.Comment
+import org.opensearch.commons.alerting.util.IndexUtils.Companion._ID
+import org.opensearch.commons.alerting.util.IndexUtils.Companion._PRIMARY_TERM
+import org.opensearch.commons.alerting.util.IndexUtils.Companion._SEQ_NO
+import org.opensearch.commons.notifications.action.BaseResponse
+import org.opensearch.core.common.io.stream.StreamInput
+import org.opensearch.core.common.io.stream.StreamOutput
+import org.opensearch.core.xcontent.ToXContent
+import org.opensearch.core.xcontent.XContentBuilder
+import java.io.IOException
+
+class IndexCommentResponse : BaseResponse {
+    var id: String
+    var seqNo: Long
+    var primaryTerm: Long
+    var comment: Comment
+
+    constructor(
+        id: String,
+        seqNo: Long,
+        primaryTerm: Long,
+        comment: Comment
+    ) : super() {
+        this.id = id
+        this.seqNo = seqNo
+        this.primaryTerm = primaryTerm
+        this.comment = comment
+    }
+
+    @Throws(IOException::class)
+    constructor(sin: StreamInput) : this(
+        sin.readString(), // id
+        sin.readLong(), // seqNo
+        sin.readLong(), // primaryTerm
+        Comment.readFrom(sin) // comment
+    )
+
+    @Throws(IOException::class)
+    override fun writeTo(out: StreamOutput) {
+        out.writeString(id)
+        out.writeLong(seqNo)
+        out.writeLong(primaryTerm)
+        comment.writeTo(out)
+    }
+
+    @Throws(IOException::class)
+    override fun toXContent(builder: XContentBuilder, params: ToXContent.Params): XContentBuilder {
+        return builder.startObject()
+            .field(_ID, id)
+            .field(_SEQ_NO, seqNo)
+            .field(_PRIMARY_TERM, primaryTerm)
+            .field("comment", comment)
+            .endObject()
+    }
+}

src/main/kotlin/org/opensearch/commons/alerting/action/SearchCommentRequest.kt

@@ -0,0 +1,33 @@
+package org.opensearch.commons.alerting.action
+
+import org.opensearch.action.ActionRequest
+import org.opensearch.action.ActionRequestValidationException
+import org.opensearch.action.search.SearchRequest
+import org.opensearch.core.common.io.stream.StreamInput
+import org.opensearch.core.common.io.stream.StreamOutput
+import java.io.IOException
+
+class SearchCommentRequest : ActionRequest {
+
+    val searchRequest: SearchRequest
+
+    constructor(
+        searchRequest: SearchRequest
+    ) : super() {
+        this.searchRequest = searchRequest
+    }
+
+    @Throws(IOException::class)
+    constructor(sin: StreamInput) : this(
+        searchRequest = SearchRequest(sin)
+    )
+
+    override fun validate(): ActionRequestValidationException? {
+        return null
+    }
+
+    @Throws(IOException::class)
+    override fun writeTo(out: StreamOutput) {
+        searchRequest.writeTo(out)
+    }
+}