[FLINK-2354] [runtime] Replace old StateHandleProvider by StateStorag…

…eHelper in ZooKeeperStateHandleStore

The old StateHandleProvider used in ZooKeeperStateHandleStore had to be replaced because the state backend implementation has changed. Since the new state backend could not be used anymore, a new StateStorageHelper interface has been created. The default implementation FileSystemStateStorageHelper stores the given state onto the specified file system and returns a FileSerializableStateHandle.

Various fixes due to rebasing.

flink-runtime-web/src/main/java/org/apache/flink/runtime/webmonitor/WebRuntimeMonitor.java

@@ -192,8 +192,6 @@ public WebRuntimeMonitor(
 
  // job manager configuration, log and stdout
  .GET("/jobmanager/config", handler(new JobManagerConfigHandler(config)))
- .GET("/jobmanager/log", new StaticFileServerHandler(logDir))
- .GET("/jobmanager/stdout", new StaticFileServerHandler(outDir))
 
  // overview over jobs
  .GET("/joboverview", handler(new CurrentJobsOverviewHandler(DEFAULT_REQUEST_TIMEOUT, true, true)))
@@ -222,6 +220,8 @@ public WebRuntimeMonitor(
  .GET("/taskmanagers", handler(new TaskManagersHandler(DEFAULT_REQUEST_TIMEOUT)))
  .GET("/taskmanagers/:" + TaskManagersHandler.TASK_MANAGER_ID_KEY, handler(new TaskManagersHandler(DEFAULT_REQUEST_TIMEOUT)))
 
+ .GET("/jobmanager/log", new StaticFileServerHandler(retriever, jobManagerAddressPromise.future(), timeout, logDir))
+ .GET("/jobmanager/stdout", new StaticFileServerHandler(retriever, jobManagerAddressPromise.future(), timeout, outDir))
  // this handler serves all the static contents
  .GET("/:*", new StaticFileServerHandler(retriever, jobManagerAddressPromise.future(), timeout, webRootDir));
 

flink-runtime-web/src/main/java/org/apache/flink/runtime/webmonitor/files/StaticFileServerHandler.java

@@ -58,10 +58,12 @@
 
 import java.io.File;
 import java.io.FileNotFoundException;
+import java.io.IOException;
 import java.io.InputStream;
 import java.io.FilenameFilter;
 import java.io.RandomAccessFile;
 import java.nio.file.Files;
+import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.Calendar;
 import java.util.Date;
@@ -198,7 +200,7 @@ public void channelRead0(ChannelHandlerContext ctx, Routed routed) throws Except
  * Response when running with leading JobManager.
  */
  private void respondAsLeader(ChannelHandlerContext ctx, HttpRequest request, String requestPath)
-  throws ParseException, IOException {
+ throws IOException, ParseException {
 
  // convert to absolute path
  final File file = new File(rootPath, requestPath);