Introduced class utils to collect general reusable functions

openvidu-server/src/main/java/io/openvidu/server/core/Utils.java

@@ -0,0 +1,24 @@
+package io.openvidu.server.core;
+
+import org.apache.commons.lang3.RandomStringUtils;
+
+public class Utils {
+
+    /**
+     * Generate a random alpha numeric key chain
+     * @return
+     */
+    public String generateRandomChain() {
+        return RandomStringUtils.randomAlphanumeric(16).toLowerCase();
+    }
+
+    /**
+     * Check that the metadata only has a max length of 10000 chars.
+     *
+     * @param metadata
+     * @return
+     */
+    public boolean isMetadataFormatCorrect(String metadata) {
+        return (metadata.length() <= 10000);
+    }
+}