Add more specific exceptions

src/Exception/ConnectionFail.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Nsq\Exception;
+
+use RuntimeException;
+use Throwable;
+
+final class ConnectionFail extends RuntimeException implements NsqException
+{
+    public static function fromThrowable(Throwable $throwable): self
+    {
+        return new self($throwable->getMessage(), (int) $throwable->getCode(), $throwable);
+    }
+}

src/Exception/MessageAlreadyFinished.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Nsq\Exception;
+
+use Nsq\Message;
+use RuntimeException;
+
+final class MessageAlreadyFinished extends RuntimeException implements NsqException
+{
+    public static function finish(Message $message): self
+    {
+        return new self('Can\'t finish message as it already finished.');
+    }
+
+    public static function requeue(Message $message): self
+    {
+        return new self('Can\'t requeue message as it already finished.');
+    }
+
+    public static function touch(Message $message): self
+    {
+        return new self('Can\'t touch message as it already finished.');
+    }
+}

src/Exception/NsqError.php

@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Nsq\Exception;
+
+use RuntimeException;
+
+final class NsqError extends RuntimeException implements NsqException
+{
+}

src/Exception/NsqException.php

@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Nsq\Exception;
+
+use Throwable;
+
+interface NsqException extends Throwable
+{
+}

src/Exception/UnexpectedResponse.php

@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Nsq\Exception;
+
+use RuntimeException;
+
+final class UnexpectedResponse extends RuntimeException implements NsqException
+{
+}