YARN-11223. [Federation] Add getAppPriority, updateApplicationPriority REST APIs for Router.

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/webapp/FederationInterceptorREST.java

@@ -1261,14 +1261,52 @@ public NodeLabelsInfo getLabelsOnNode(HttpServletRequest hsr, String nodeId)
   @Override
   public AppPriority getAppPriority(HttpServletRequest hsr, String appId)
       throws AuthorizationException {
-    throw new NotImplementedException("Code is not implemented");
+
+    if (appId == null || appId.isEmpty()) {
+      throw new IllegalArgumentException("Parameter error, the appId is empty or null.");
+    }
+
+    try {
+      SubClusterInfo subClusterInfo = getHomeSubClusterInfoByAppId(appId);
+      DefaultRequestInterceptorREST interceptor = getOrCreateInterceptorForSubCluster(
+          subClusterInfo.getSubClusterId(), subClusterInfo.getRMWebServiceAddress());
+      return interceptor.getAppPriority(hsr, appId);
+    } catch (IllegalArgumentException e) {
+      RouterServerUtil.logAndThrowRunTimeException(e,
+          "Unable to get the getAppPriority appId: %s.", appId);
+    } catch (YarnException e) {
+      RouterServerUtil.logAndThrowRunTimeException("getAppPriority Failed.", e);
+    }
+
+    return null;
   }
 
   @Override
   public Response updateApplicationPriority(AppPriority targetPriority,
       HttpServletRequest hsr, String appId) throws AuthorizationException,
       YarnException, InterruptedException, IOException {
-    throw new NotImplementedException("Code is not implemented");
+
+    if (appId == null || appId.isEmpty()) {
+      throw new IllegalArgumentException("Parameter error, the appId is empty or null.");
+    }
+
+    if (targetPriority == null) {
+      throw new IllegalArgumentException("Parameter error, the targetPriority is empty or null.");
+    }
+
+    try {
+      SubClusterInfo subClusterInfo = getHomeSubClusterInfoByAppId(appId);
+      DefaultRequestInterceptorREST interceptor = getOrCreateInterceptorForSubCluster(
+          subClusterInfo.getSubClusterId(), subClusterInfo.getRMWebServiceAddress());
+      return interceptor.updateApplicationPriority(targetPriority, hsr, appId);
+    } catch (IllegalArgumentException e) {
+      RouterServerUtil.logAndThrowRunTimeException(e,
+          "Unable to get the updateApplicationPriority appId: %s.", appId);
+    } catch (YarnException e) {
+      RouterServerUtil.logAndThrowRunTimeException("updateApplicationPriority Failed.", e);
+    }
+
+    return null;
   }
 
   @Override

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/test/java/org/apache/hadoop/yarn/server/router/webapp/MockDefaultRequestInterceptorREST.java

@@ -76,6 +76,7 @@
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.AppAttemptsInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.AppTimeoutInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.AppTimeoutsInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.AppPriority;
 import org.apache.hadoop.yarn.server.webapp.dao.AppAttemptInfo;
 import org.apache.hadoop.yarn.server.webapp.dao.ContainerInfo;
 import org.apache.hadoop.yarn.server.webapp.dao.ContainersInfo;
@@ -579,4 +580,45 @@ public Response updateApplicationTimeout(AppTimeoutInfo appTimeout, HttpServletR
 
     return Response.status(Status.OK).entity(result).build();
   }
+
+  @Override
+  public Response updateApplicationPriority(AppPriority targetPriority, HttpServletRequest hsr,
+      String appId) throws YarnException, InterruptedException, IOException {
+    if (!isRunning) {
+      throw new RuntimeException("RM is stopped");
+    }
+
+    ApplicationId applicationId = ApplicationId.fromString(appId);
+    if (targetPriority == null) {
+      return Response.status(Status.BAD_REQUEST).build();
+    }
+
+    if (!applicationMap.containsKey(applicationId)) {
+      throw new NotFoundException("app with id: " + appId + " not found");
+    }
+
+    ApplicationReport appReport = applicationMap.get(applicationId);
+    Priority newPriority = Priority.newInstance(targetPriority.getPriority());
+    appReport.setPriority(newPriority);
+
+    return Response.status(Status.OK).entity(targetPriority).build();
+  }
+
+  @Override
+  public AppPriority getAppPriority(HttpServletRequest hsr, String appId)
+      throws AuthorizationException {
+    if (!isRunning) {
+      throw new RuntimeException("RM is stopped");
+    }
+
+    ApplicationId applicationId = ApplicationId.fromString(appId);
+
+    if (!applicationMap.containsKey(applicationId)) {
+      throw new NotFoundException("app with id: " + appId + " not found");
+    }
+    ApplicationReport appReport = applicationMap.get(applicationId);
+    Priority priority = appReport.getPriority();
+
+    return new AppPriority(priority.getPriority());
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/test/java/org/apache/hadoop/yarn/server/router/webapp/TestFederationInterceptorREST.java

@@ -61,6 +61,7 @@
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.AppAttemptInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.AppTimeoutInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.AppTimeoutsInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.AppPriority;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.NodeIDsInfo;
 import org.apache.hadoop.yarn.server.webapp.dao.ContainerInfo;
 import org.apache.hadoop.yarn.server.webapp.dao.ContainersInfo;
@@ -855,4 +856,48 @@ public void testUpdateApplicationTimeout() throws IOException, InterruptedExcept
     Assert.assertEquals(paramAppTimeOut.getTimeoutType(), entity.getTimeoutType());
     Assert.assertEquals(paramAppTimeOut.getRemainingTimeInSec(), entity.getRemainingTimeInSec());
   }
+
+  @Test
+  public void testUpdateApplicationPriority() throws IOException, InterruptedException,
+      YarnException {
+
+    // Submit application to multiSubCluster
+    ApplicationId appId = ApplicationId.newInstance(Time.now(), 1);
+    ApplicationSubmissionContextInfo context = new ApplicationSubmissionContextInfo();
+    context.setApplicationId(appId.toString());
+    context.setPriority(20);
+
+    // Submit the application we are going to kill later
+    Assert.assertNotNull(interceptor.submitApplication(context, null));
+
+    int iPriority = 10;
+    // Set Priority for application
+    Response response = interceptor.updateApplicationPriority(
+        new AppPriority(iPriority), null, appId.toString());
+
+    Assert.assertNotNull(response);
+    AppPriority entity = (AppPriority) response.getEntity();
+    Assert.assertNotNull(entity);
+    Assert.assertEquals(iPriority, entity.getPriority());
+  }
+
+  @Test
+  public void testGetAppPriority() throws IOException, InterruptedException,
+      YarnException {
+
+    // Submit application to multiSubCluster
+    ApplicationId appId = ApplicationId.newInstance(Time.now(), 1);
+    int priority = 40;
+    ApplicationSubmissionContextInfo context = new ApplicationSubmissionContextInfo();
+    context.setApplicationId(appId.toString());
+    context.setPriority(priority);
+
+    // Submit the application we are going to kill later
+    Assert.assertNotNull(interceptor.submitApplication(context, null));
+
+    // Set Priority for application
+    AppPriority appPriority = interceptor.getAppPriority(null, appId.toString());
+    Assert.assertNotNull(appPriority);
+    Assert.assertEquals(priority, appPriority.getPriority());
+  }
 }