Fix MongoDBContainer when reuse is enabled (#6235)

Co-authored-by: Eddú Meléndez <[email protected]>

Author: tiboun

modules/mongodb/build.gradle

@@ -6,3 +6,9 @@ dependencies {
     testImplementation("org.mongodb:mongodb-driver-sync:4.8.0")
     testImplementation 'org.assertj:assertj-core:3.23.1'
 }
+
+tasks.japicmp {
+    methodExcludes = [
+        "org.testcontainers.containers.MongoDBContainer#containerIsStarted(com.github.dockerjava.api.command.InspectContainerResponse)"
+    ]
+}

modules/mongodb/src/main/java/org/testcontainers/containers/MongoDBContainer.java

@@ -82,8 +82,12 @@ public String getReplicaSetUrl(final String databaseName) {
     }
 
     @Override
-    protected void containerIsStarted(InspectContainerResponse containerInfo) {
-        initReplicaSet();
+    protected void containerIsStarted(InspectContainerResponse containerInfo, boolean reused) {
+        if (reused && isReplicationSetAlreadyInitialized()) {
+            log.debug("Replica set already initialized.");
+        } else {
+            initReplicaSet();
+        }
     }
 
     private String[] buildMongoEvalCommand(final String command) {
@@ -151,4 +155,13 @@ public static class ReplicaSetInitializationException extends RuntimeException {
             super(errorMessage);
         }
     }
+
+    @SneakyThrows
+    private boolean isReplicationSetAlreadyInitialized() {
+        // since we are creating a replica set with one node, this node must be primary (state = 1)
+        final ExecResult execCheckRsInit = execInContainer(
+            buildMongoEvalCommand("if(db.adminCommand({replSetGetStatus: 1})['myState'] != 1) quit(900)")
+        );
+        return execCheckRsInit.getExitCode() == CONTAINER_EXIT_CODE_OK;
+    }
 }