allow getting the path from the lockedexception

lib/private/lock/memcachelockingprovider.php

@@ -62,12 +62,12 @@ class MemcacheLockingProvider implements ILockingProvider {
 	public function acquireLock($path, $type) {
 		if ($type === self::LOCK_SHARED) {
 			if (!$this->memcache->inc($path)) {
-				throw new LockedException($path . ' is locked');
+				throw new LockedException($path);
 			}
 		} else {
 			$this->memcache->add($path, 0);
 			if (!$this->memcache->cas($path, 0, 'exclusive')) {
-				throw new LockedException($path . ' is locked');
+				throw new LockedException($path);
 			}
 		}
 	}

lib/public/lock/lockedexception.php

@@ -22,4 +22,25 @@
 namespace OCP\Lock;
 
 class LockedException extends \Exception {
+	/**
+	 * @var string
+	 */
+	private $path;
+
+	/**
+	 * LockedException constructor.
+	 *
+	 * @param string $path
+	 */
+	public function __construct($path) {
+		parent::__construct($path . ' is locked');
+		$this->path = $path;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function getPath() {
+		return $this->path;
+	}
 }

tests/lib/lock/lockingprovider.php

@@ -22,6 +22,7 @@
 namespace Test\Lock;
 
 use OCP\Lock\ILockingProvider;
+use OCP\Lock\LockedException;
 use Test\TestCase;
 
 abstract class LockingProvider extends TestCase {
@@ -115,4 +116,22 @@ abstract class LockingProvider extends TestCase {
 		$this->assertTrue($this->instance->isLocked('foo', ILockingProvider::LOCK_EXCLUSIVE));
 		$this->instance->acquireLock('foo', ILockingProvider::LOCK_SHARED);
 	}
+
+	public function testLockedExceptionHasPathForShared() {
+		try {
+			$this->testSharedLockAfterExclusive();
+			$this->fail('Expected locked exception');
+		} catch (LockedException $e) {
+			$this->assertEquals('foo', $e->getPath());
+		}
+	}
+
+	public function testLockedExceptionHasPathForExclusive() {
+		try {
+			$this->testExclusiveLockAfterShared();
+			$this->fail('Expected locked exception');
+		} catch (LockedException $e) {
+			$this->assertEquals('foo', $e->getPath());
+		}
+	}
 }