Added workflow as a composite monitor

src/main/kotlin/org/opensearch/commons/alerting/AlertingPluginInterface.kt

@@ -14,12 +14,18 @@ import org.opensearch.commons.alerting.action.AcknowledgeAlertResponse
 import org.opensearch.commons.alerting.action.AlertingActions
 import org.opensearch.commons.alerting.action.DeleteMonitorRequest
 import org.opensearch.commons.alerting.action.DeleteMonitorResponse
+import org.opensearch.commons.alerting.action.DeleteWorkflowRequest
+import org.opensearch.commons.alerting.action.DeleteWorkflowResponse
 import org.opensearch.commons.alerting.action.GetAlertsRequest
 import org.opensearch.commons.alerting.action.GetAlertsResponse
 import org.opensearch.commons.alerting.action.GetFindingsRequest
 import org.opensearch.commons.alerting.action.GetFindingsResponse
+import org.opensearch.commons.alerting.action.GetWorkflowRequest
+import org.opensearch.commons.alerting.action.GetWorkflowResponse
 import org.opensearch.commons.alerting.action.IndexMonitorRequest
 import org.opensearch.commons.alerting.action.IndexMonitorResponse
+import org.opensearch.commons.alerting.action.IndexWorkflowRequest
+import org.opensearch.commons.alerting.action.IndexWorkflowResponse
 import org.opensearch.commons.notifications.action.BaseResponse
 import org.opensearch.commons.utils.recreateObject
 
@@ -53,6 +59,7 @@ object AlertingPluginInterface {
             }
         )
     }
+
     fun deleteMonitor(
         client: NodeClient,
         request: DeleteMonitorRequest,
@@ -71,6 +78,49 @@ object AlertingPluginInterface {
         )
     }
 
+    /**
+     * Index monitor interface.
+     * @param client Node client for making transport action
+     * @param request The request object
+     * @param namedWriteableRegistry Registry for building aggregations
+     * @param listener The listener for getting response
+     */
+    fun indexWorkflow(
+        client: NodeClient,
+        request: IndexWorkflowRequest,
+        listener: ActionListener<IndexWorkflowResponse>
+    ) {
+        client.execute(
+            AlertingActions.INDEX_WORKFLOW_ACTION_TYPE,
+            request,
+            wrapActionListener(listener) { response ->
+                recreateObject(response) {
+                    IndexWorkflowResponse(
+                        it
+                    )
+                }
+            }
+        )
+    }
+
+    fun deleteWorkflow(
+        client: NodeClient,
+        request: DeleteWorkflowRequest,
+        listener: ActionListener<DeleteWorkflowResponse>
+    ) {
+        client.execute(
+            AlertingActions.DELETE_WORKFLOW_ACTION_TYPE,
+            request,
+            wrapActionListener(listener) { response ->
+                recreateObject(response) {
+                    DeleteWorkflowResponse(
+                        it
+                    )
+                }
+            }
+        )
+    }
+
     /**
      * Get Alerts interface.
      * @param client Node client for making transport action
@@ -95,6 +145,30 @@ object AlertingPluginInterface {
         )
     }
 
+    /**
+     * Get Workflow interface.
+     * @param client Node client for making transport action
+     * @param request The request object
+     * @param listener The listener for getting response
+     */
+    fun getWorkflow(
+        client: NodeClient,
+        request: GetWorkflowRequest,
+        listener: ActionListener<GetWorkflowResponse>
+    ) {
+        client.execute(
+            AlertingActions.GET_WORKFLOW_ACTION_TYPE,
+            request,
+            wrapActionListener(listener) { response ->
+                recreateObject(response) {
+                    GetWorkflowResponse(
+                        it
+                    )
+                }
+            }
+        )
+    }
+
     /**
      * Get Findings interface.
      * @param client Node client for making transport action

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

@@ -8,21 +8,34 @@ import org.opensearch.action.ActionType
 
 object AlertingActions {
     const val INDEX_MONITOR_ACTION_NAME = "cluster:admin/opendistro/alerting/monitor/write"
+    const val INDEX_WORKFLOW_ACTION_NAME = "cluster:admin/opensearch/alerting/workflow/write"
     const val GET_ALERTS_ACTION_NAME = "cluster:admin/opendistro/alerting/alerts/get"
+    const val GET_WORKFLOW_ACTION_NAME = "cluster:admin/opensearch/alerting/workflow/get"
     const val DELETE_MONITOR_ACTION_NAME = "cluster:admin/opendistro/alerting/monitor/delete"
+    const val DELETE_WORKFLOW_ACTION_NAME = "cluster:admin/opensearch/alerting/workflow/delete"
     const val GET_FINDINGS_ACTION_NAME = "cluster:admin/opensearch/alerting/findings/get"
     const val ACKNOWLEDGE_ALERTS_ACTION_NAME = "cluster:admin/opendistro/alerting/alerts/ack"
 
     @JvmField
     val INDEX_MONITOR_ACTION_TYPE =
         ActionType(INDEX_MONITOR_ACTION_NAME, ::IndexMonitorResponse)
     @JvmField
+    val INDEX_WORKFLOW_ACTION_TYPE =
+        ActionType(INDEX_WORKFLOW_ACTION_NAME, ::IndexWorkflowResponse)
+    @JvmField
     val GET_ALERTS_ACTION_TYPE =
         ActionType(GET_ALERTS_ACTION_NAME, ::GetAlertsResponse)
     @JvmField
+    val GET_WORKFLOW_ACTION_TYPE =
+        ActionType(GET_WORKFLOW_ACTION_NAME, ::GetWorkflowResponse)
+
+    @JvmField
     val DELETE_MONITOR_ACTION_TYPE =
         ActionType(DELETE_MONITOR_ACTION_NAME, ::DeleteMonitorResponse)
     @JvmField
+    val DELETE_WORKFLOW_ACTION_TYPE =
+        ActionType(DELETE_WORKFLOW_ACTION_NAME, ::DeleteWorkflowResponse)
+    @JvmField
     val GET_FINDINGS_ACTION_TYPE =
         ActionType(GET_FINDINGS_ACTION_NAME, ::GetFindingsResponse)
     @JvmField

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

@@ -0,0 +1,38 @@
+package org.opensearch.commons.alerting.action
+
+import org.opensearch.action.ActionRequest
+import org.opensearch.action.ActionRequestValidationException
+import org.opensearch.common.io.stream.StreamInput
+import org.opensearch.common.io.stream.StreamOutput
+import java.io.IOException
+
+class DeleteWorkflowRequest : ActionRequest {
+
+    val workflowId: String
+    /**
+     * Flag that indicates whether the delegate monitors should be deleted or not.
+     * If the flag is set to true, Delegate monitors will be deleted only in the case when they are part of the specified workflow and no other.
+     */
+    val deleteDelegateMonitors: Boolean?
+
+    constructor(workflowId: String, deleteDelegateMonitors: Boolean?) : super() {
+        this.workflowId = workflowId
+        this.deleteDelegateMonitors = deleteDelegateMonitors
+    }
+
+    @Throws(IOException::class)
+    constructor(sin: StreamInput) : this(
+        workflowId = sin.readString(),
+        deleteDelegateMonitors = sin.readOptionalBoolean()
+    )
+
+    override fun validate(): ActionRequestValidationException? {
+        return null
+    }
+
+    @Throws(IOException::class)
+    override fun writeTo(out: StreamOutput) {
+        out.writeString(workflowId)
+        out.writeOptionalBoolean(deleteDelegateMonitors)
+    }
+}

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

@@ -0,0 +1,38 @@
+package org.opensearch.commons.alerting.action
+
+import org.opensearch.common.io.stream.StreamInput
+import org.opensearch.common.io.stream.StreamOutput
+import org.opensearch.common.xcontent.ToXContent
+import org.opensearch.common.xcontent.XContentBuilder
+import org.opensearch.commons.alerting.util.IndexUtils
+import org.opensearch.commons.notifications.action.BaseResponse
+
+class DeleteWorkflowResponse : BaseResponse {
+    var id: String
+    var version: Long
+
+    constructor(
+        id: String,
+        version: Long
+    ) : super() {
+        this.id = id
+        this.version = version
+    }
+
+    constructor(sin: StreamInput) : this(
+        sin.readString(), // id
+        sin.readLong() // version
+    )
+
+    override fun writeTo(out: StreamOutput) {
+        out.writeString(id)
+        out.writeLong(version)
+    }
+
+    override fun toXContent(builder: XContentBuilder, params: ToXContent.Params): XContentBuilder {
+        return builder.startObject()
+            .field(IndexUtils._ID, id)
+            .field(IndexUtils._VERSION, version)
+            .endObject()
+    }
+}

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

@@ -0,0 +1,42 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.commons.alerting.action
+
+import org.opensearch.action.ActionRequest
+import org.opensearch.action.ActionRequestValidationException
+import org.opensearch.common.io.stream.StreamInput
+import org.opensearch.common.io.stream.StreamOutput
+import org.opensearch.rest.RestRequest
+import java.io.IOException
+
+class GetWorkflowRequest : ActionRequest {
+    val workflowId: String
+    val method: RestRequest.Method
+
+    constructor(
+        workflowId: String,
+        method: RestRequest.Method
+    ) : super() {
+        this.workflowId = workflowId
+        this.method = method
+    }
+
+    @Throws(IOException::class)
+    constructor(sin: StreamInput) : this(
+        sin.readString(), // workflowId
+        sin.readEnum(RestRequest.Method::class.java) // method
+    )
+
+    override fun validate(): ActionRequestValidationException? {
+        return null
+    }
+
+    @Throws(IOException::class)
+    override fun writeTo(out: StreamOutput) {
+        out.writeString(workflowId)
+        out.writeEnum(method)
+    }
+}

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

@@ -0,0 +1,88 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.commons.alerting.action
+
+import org.opensearch.common.io.stream.StreamInput
+import org.opensearch.common.io.stream.StreamOutput
+import org.opensearch.common.xcontent.ToXContent
+import org.opensearch.common.xcontent.XContentBuilder
+import org.opensearch.commons.alerting.model.Workflow
+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.alerting.util.IndexUtils.Companion._VERSION
+import org.opensearch.commons.notifications.action.BaseResponse
+import org.opensearch.rest.RestStatus
+import java.io.IOException
+
+class GetWorkflowResponse : BaseResponse {
+    var id: String
+    var version: Long
+    var seqNo: Long
+    var primaryTerm: Long
+    private var status: RestStatus
+    var workflow: Workflow?
+
+    constructor(
+        id: String,
+        version: Long,
+        seqNo: Long,
+        primaryTerm: Long,
+        status: RestStatus,
+        workflow: Workflow?
+    ) : super() {
+        this.id = id
+        this.version = version
+        this.seqNo = seqNo
+        this.primaryTerm = primaryTerm
+        this.status = status
+        this.workflow = workflow
+    }
+
+    @Throws(IOException::class)
+    constructor(sin: StreamInput) : this(
+        sin.readString(), // id
+        sin.readLong(), // version
+        sin.readLong(), // seqNo
+        sin.readLong(), // primaryTerm
+        sin.readEnum(RestStatus::class.java), // RestStatus
+        if (sin.readBoolean()) {
+            Workflow.readFrom(sin) // monitor
+        } else null
+    )
+
+    @Throws(IOException::class)
+    override fun writeTo(out: StreamOutput) {
+        out.writeString(id)
+        out.writeLong(version)
+        out.writeLong(seqNo)
+        out.writeLong(primaryTerm)
+        out.writeEnum(status)
+        if (workflow != null) {
+            out.writeBoolean(true)
+            workflow?.writeTo(out)
+        } else {
+            out.writeBoolean(false)
+        }
+    }
+
+    @Throws(IOException::class)
+    override fun toXContent(builder: XContentBuilder, params: ToXContent.Params): XContentBuilder {
+        builder.startObject()
+            .field(_ID, id)
+            .field(_VERSION, version)
+            .field(_SEQ_NO, seqNo)
+            .field(_PRIMARY_TERM, primaryTerm)
+        if (workflow != null)
+            builder.field("workflow", workflow)
+
+        return builder.endObject()
+    }
+
+    override fun getStatus(): RestStatus {
+        return this.status
+    }
+}