openvidu-server: allow for empty kms.uris array. DockerManager#getRunningContainers

openvidu-server/src/main/java/io/openvidu/server/config/OpenviduConfig.java

@@ -394,10 +394,15 @@ public class OpenviduConfig {
 		Gson gson = new Gson();
 		JsonArray kmsUrisArray = gson.fromJson(kmsUris, JsonArray.class);
 		this.kmsUrisList = JsonUtils.toStringList(kmsUrisArray);
+		if (kmsUrisList.size() == 1 && kmsUrisList.get(0).isEmpty()) {
+			log.warn("Array kms.uris is empty");
+			this.kmsUrisList = new ArrayList<>();
+		} else {
 			for (String uri : kmsUrisList) {
 				this.checkWebsocketUri(uri);
 			}
 		}
+	}
 
 	public void initiateOpenViduWebhookEndpoint(String endpoint) throws Exception {
 		try {

openvidu-server/src/main/java/io/openvidu/server/kurento/kms/FixedOneKmsManager.java

@@ -26,7 +26,7 @@ import org.kurento.commons.exception.KurentoException;
 public class FixedOneKmsManager extends KmsManager {
 
 	@Override
-	public List<Kms> initializeKurentoClients(List<String> kmsUris) throws Exception {
+	public List<Kms> initializeKurentoClients(List<String> kmsUris, boolean disconnectUponFailure) throws Exception {
 		final String kmsUri = kmsUris.get(0);
 		KurentoClient kClient = null;
 		Kms kms = new Kms(kmsUri, loadManager);
@@ -35,6 +35,9 @@ public class FixedOneKmsManager extends KmsManager {
 			kClient = KurentoClient.create(kmsUri, this.generateKurentoConnectionListener(kms.getId()));
 		} catch (KurentoException e) {
 			log.error("KMS in {} is not reachable by OpenVidu Server", kmsUri);
+			if (kClient != null) {
+				kClient.destroy();
+			}
 			throw new Exception();
 		}
 

openvidu-server/src/main/java/io/openvidu/server/kurento/kms/KmsManager.java

@@ -183,12 +183,13 @@ public abstract class KmsManager {
 		};
 	}
 
-	public abstract List<Kms> initializeKurentoClients(List<String> kmsUris) throws Exception;
+	public abstract List<Kms> initializeKurentoClients(List<String> kmsUris, boolean disconnectUponFailure)
+			throws Exception;
 
 	@PostConstruct
 	private void postConstruct() {
 		try {
-			this.initializeKurentoClients(this.openviduConfig.getKmsUris());
+			this.initializeKurentoClients(this.openviduConfig.getKmsUris(), true);
 		} catch (Exception e) {
 			// Some KMS wasn't reachable
 			log.error("Shutting down OpenVidu Server");

openvidu-server/src/main/java/io/openvidu/server/recording/service/RecordingManager.java

@@ -428,8 +428,8 @@ public class RecordingManager {
 	}
 
 	public String getRecordingUrl(Recording recording) {
-		return openviduConfig.getFinalUrl() + "recordings/" + recording.getId() + "/"
-						+ recording.getName() + "." + this.getExtensionFromRecording(recording);
+		return openviduConfig.getFinalUrl() + "recordings/" + recording.getId() + "/" + recording.getName() + "."
+				+ this.getExtensionFromRecording(recording);
 	}
 
 	private String getExtensionFromRecording(Recording recording) {
@@ -574,6 +574,10 @@ public class RecordingManager {
 		final String testFilePath = testFolderPath + "/TEST_RECORDING_PATH.webm";
 
 		// Check Kurento Media Server write permissions in recording path
+		if (this.openviduConfig.getKmsUris().isEmpty()) {
+			log.warn("No KMSs were defined in kms.uris array. Recording path check aborted");
+		} else {
+
 			MediaPipeline pipeline = this.kmsManager.getLessLoadedKms().getKurentoClient().createMediaPipeline();
 			RecorderEndpoint recorder = new RecorderEndpoint.Builder(pipeline, "file://" + testFilePath).build();
 
@@ -621,10 +625,12 @@ public class RecordingManager {
 						+ "Try running Kurento Media Server as user \"" + System.getProperty("user.name")
 						+ "\" or run OpenVidu Server as superuser";
 				log.error(errorMessage);
-			log.error("Be aware that a folder \"{}\" was created and should be manually deleted (\"sudo rm -rf {}\")",
+				log.error(
+						"Be aware that a folder \"{}\" was created and should be manually deleted (\"sudo rm -rf {}\")",
 						testFolderPath, testFolderPath);
 				throw new OpenViduException(Code.RECORDING_PATH_NOT_VALID, errorMessage);
 			}
+		}
 
 		if (openviduConfig.openviduRecordingCustomLayoutChanged(openviduRecordingCustomLayout)) {
 			// Property openvidu.recording.custom-layout changed

openvidu-server/src/main/java/io/openvidu/server/utils/DockerManager.java

@@ -208,6 +208,17 @@ public class DockerManager {
 		}
 	}
 
+	public List<String> getRunningContainers(String fullImageName) {
+		List<String> containerIds = new ArrayList<>();
+		List<Container> existingContainers = this.dockerClient.listContainersCmd().exec();
+		for (Container container : existingContainers) {
+			if (container.getImage().startsWith(fullImageName)) {
+				containerIds.add(container.getId());
+			}
+		}
+		return containerIds;
+	}
+
 	static public String getDockerGatewayIp() {
 		try {
 			return CommandExecutor.execCommand("/bin/sh", "-c",