L05DOCBST-38 always return this in LoggerTrait

src/library/LoggerTrait.php

@@ -29,6 +29,7 @@ trait LoggerTrait {
     /**
      * set logger to send log messages to
      * @param \Psr\Log\LoggerInterface $logger
+     * @return $this
      */
     public function set_logger(\Psr\Log\LoggerInterface $logger) {
 
@@ -40,73 +41,77 @@ trait LoggerTrait {
      * debug message
      * @param string $message
      * @param array $context if not set the ndc is used
-     * @return type
+     * @return $this
      */
     public function debug(string $message, array $context = null) {
 
-        if (!isset($this->logger)) {
-            return;
+        if (isset($this->logger)) {
+            $this->logger->debug($message, isset($context) ? $context : $this->ndc_context);
         }
-        $this->logger->debug($message, isset($context) ? $context : $this->ndc_context);
+        return $this;
     }
 
     /**
      * info message
      * @param string $message
      * @param array $context if not set the ndc is used
-     * @return type
+     * @return $this
      */
     public function info(string $message, array $context = null) {
 
-        if (!isset($this->logger)) {
-            return;
+        if (isset($this->logger)) {
+            $this->logger->info($message, isset($context) ? $context : $this->ndc_context);
         }
-        $this->logger->info($message, isset($context) ? $context : $this->ndc_context);
+        return $this;
     }
 
     /**
      * warning message
      * @param string $message
      * @param array $context if not set the ndc is used
-     * @return type
+     * @return $this
      */
     public function warning(string $message, array $context = null) {
 
-        if (!isset($this->logger)) {
-            return;
+        if (isset($this->logger)) {
+            $this->logger->warning($message, isset($context) ? $context : $this->ndc_context);
         }
-        $this->logger->warning($message, isset($context) ? $context : $this->ndc_context);
+        return $this;
     }
 
     /**
      * error message
      * @param string $message
      * @param array $context if not set the ndc is used
-     * @return type
+     * @return $this
      */
     public function error(string $message, array $context = null) {
 
-        if (!isset($this->logger)) {
-            return;
+        if (isset($this->logger)) {
+            $this->logger->error($message, isset($context) ? $context : $this->ndc_context);
         }
-        $this->logger->error($message, isset($context) ? $context : $this->ndc_context);
+        return $this;
     }
 
     /**
      * add message to the ndc (nested diagnostic context)
      * @param string $message
+     * @return $this
      */
     public function ndc_push(string $message){
 
         array_push($this->ndc_context, $message);
+        return $this;
     }
 
     /**
      * remove last message from the ndc (nested diagnostic context)
+     * @return $this
      */
     public function ndc_pop(){
 
         array_pop($this->ndc_context);
+        return $this;
     }
 
 }
\ No newline at end of file