server: fix metadata values after resume

it/runtime-v2/src/test/java/com/walmartlabs/concord/it/runtime/v2/ProcessIT.java

@@ -546,4 +546,17 @@ public void testRestart() throws Exception {
         assertFalse(waitConditions.getIsWaiting());
         assertNull(waitConditions.getWaits());
     }
+
+    @Test
+    public void metaAfterSuspend() throws Exception {
+        Payload payload = new Payload()
+                .archive(resource("metaAfterSuspend"));
+
+        ConcordProcess proc = concord.processes().start(payload);
+        ProcessEntry pe = expectStatus(proc, ProcessEntry.StatusEnum.FAILED);
+
+        // ---
+        Object myMetaValue = pe.getMeta().get("myMetaVar");
+        assertEquals("myMetaVarValue", myMetaValue);
+    }
 }

it/runtime-v2/src/test/resources/com/walmartlabs/concord/it/runtime/v2/metaAfterSuspend/concord.yml

@@ -0,0 +1,18 @@
+configuration:
+  runtime: "concord-v2"
+  meta:
+    myMetaVar: "n/a"
+
+flows:
+  default:
+    - set:
+        myMetaVar: "myMetaVarValue"
+
+    - task: concord
+      in:
+        action: start
+        payload: payload
+        sync: true
+        suspend: true
+        arguments:
+          name: "Concord"

it/runtime-v2/src/test/resources/com/walmartlabs/concord/it/runtime/v2/metaAfterSuspend/payload/concord.yml

@@ -0,0 +1,6 @@
+configuration:
+  runtime: "concord-v2"
+
+flows:
+  default:
+    - throw: "BOOM"

server/impl/src/main/java/com/walmartlabs/concord/server/process/pipelines/ResumePipeline.java

@@ -51,7 +51,7 @@ public ResumePipeline(Injector injector) {
                 DependencyVersionsExportProcessor.class,
                 PolicyExportProcessor.class,
                 StateImportingProcessor.class,
-                EnqueueingProcessor.class);
+                ResumeProcessor.class);
 
         this.exceptionProcessor = injector.getInstance(FailProcessor.class);
         this.finalizerProcessor = injector.getInstance(CleanupProcessor.class);

server/impl/src/main/java/com/walmartlabs/concord/server/process/pipelines/processors/ResumeProcessor.java

@@ -0,0 +1,62 @@
+package com.walmartlabs.concord.server.process.pipelines.processors;
+
+/*-
+ * *****
+ * Concord
+ * -----
+ * Copyright (C) 2017 - 2023 Walmart Inc.
+ * -----
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * =====
+ */
+
+import com.walmartlabs.concord.server.process.Payload;
+import com.walmartlabs.concord.server.process.queue.ProcessQueueManager;
+import com.walmartlabs.concord.server.sdk.ProcessKey;
+import com.walmartlabs.concord.server.sdk.ProcessStatus;
+import com.walmartlabs.concord.server.sdk.metrics.WithTimer;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.inject.Inject;
+import javax.inject.Named;
+
+/**
+ * Moves the process into ENQUEUED status if current process eq RESUMING.
+ */
+@Named
+public class ResumeProcessor implements PayloadProcessor {
+
+    private static final Logger log = LoggerFactory.getLogger(ResumeProcessor.class);
+
+    private final ProcessQueueManager queueManager;
+
+    @Inject
+    public ResumeProcessor(ProcessQueueManager queueManager) {
+        this.queueManager = queueManager;
+    }
+
+    @Override
+    @WithTimer
+    public Payload process(Chain chain, Payload payload) {
+        ProcessKey processKey = payload.getProcessKey();
+
+        boolean updated = queueManager.updateExpectedStatus(processKey, ProcessStatus.RESUMING, ProcessStatus.ENQUEUED);
+        if (updated) {
+            return chain.process(payload);
+        }
+
+        log.warn("process ['{}'] -> process is not suspended, can't resume", processKey);
+        throw new InvalidProcessStateException("Process is not suspended, can't resume");
+    }
+}