Use method reference when possible

Change-Id: I9bf98b91fbd09c68588b23f116f694f58de0dedc

java/com/google/gerrit/acceptance/AcceptanceTestRequestScope.java

@@ -166,13 +166,7 @@ public class AcceptanceTestRequestScope {
 
   public Context disableDb() {
     Context old = current.get();
-    SchemaFactory<ReviewDb> sf =
+    SchemaFactory<ReviewDb> sf = DisabledReviewDb::new;
-        new SchemaFactory<ReviewDb>() {
-          @Override
-          public ReviewDb open() {
-            return new DisabledReviewDb();
-          }
-        };
     Context ctx = new Context(sf, old.session, old.user, old.created);
 
     current.set(ctx);

java/com/google/gerrit/httpd/plugins/HttpPluginServlet.java

@@ -202,13 +202,7 @@ class HttpPluginServlet extends HttpServlet implements StartPluginListener, Relo
         return null;
       }
 
-      plugin.add(
+      plugin.add(filter::destroy);
-          new RegistrationHandle() {
-            @Override
-            public void remove() {
-              filter.destroy();
-            }
-          });
       return filter;
     }
     return null;

java/com/google/gerrit/httpd/plugins/LfsPluginServlet.java

@@ -151,13 +151,7 @@ public class LfsPluginServlet extends HttpServlet
         return null;
       }
 
-      plugin.add(
+      plugin.add(guiceFilter::destroy);
-          new RegistrationHandle() {
-            @Override
-            public void remove() {
-              guiceFilter.destroy();
-            }
-          });
       return guiceFilter;
     }
     return null;

java/com/google/gerrit/metrics/proc/JGitMetricModule.java

@@ -14,7 +14,6 @@
 
 package com.google.gerrit.metrics.proc;
 
-import com.google.common.base.Supplier;
 import com.google.gerrit.metrics.Description;
 import com.google.gerrit.metrics.Description.Units;
 import com.google.gerrit.metrics.MetricMaker;
@@ -29,22 +28,12 @@ public class JGitMetricModule extends MetricModule {
         new Description("Bytes of memory retained in JGit block cache.")
             .setGauge()
             .setUnit(Units.BYTES),
-        new Supplier<Long>() {
+        WindowCacheStats::getOpenBytes);
-          @Override
-          public Long get() {
-            return WindowCacheStats.getOpenBytes();
-          }
-        });
 
     metrics.newCallbackMetric(
         "jgit/block_cache/open_files",
         Integer.class,
         new Description("File handles held open by JGit block cache.").setGauge().setUnit("fds"),
-        new Supplier<Integer>() {
+        WindowCacheStats::getOpenFiles);
-          @Override
-          public Integer get() {
-            return WindowCacheStats.getOpenFiles();
-          }
-        });
   }
 }

java/com/google/gerrit/metrics/proc/ProcMetricModule.java

@@ -60,12 +60,7 @@ public class ProcMetricModule extends MetricModule {
         "proc/uptime",
         Long.class,
         new Description("Uptime of this process").setUnit(Units.MILLISECONDS),
-        new Supplier<Long>() {
+        ManagementFactory.getRuntimeMXBean()::getUptime);
-          @Override
-          public Long get() {
-            return ManagementFactory.getRuntimeMXBean().getUptime();
-          }
-        });
   }
 
   private void procCpuUsage(MetricMaker metrics) {
@@ -93,12 +88,7 @@ public class ProcMetricModule extends MetricModule {
           "proc/num_open_fds",
           Long.class,
           new Description("Number of open file descriptors").setGauge().setUnit("fds"),
-          new Supplier<Long>() {
+          provider::getOpenFileDescriptorCount);
-            @Override
-            public Long get() {
-              return provider.getOpenFileDescriptorCount();
-            }
-          });
     }
   }
 

java/com/google/gerrit/server/git/receive/ReceiveCommits.java

@@ -2984,13 +2984,7 @@ class ReceiveCommits {
                     id,
                     mergedByPushOpFactory
                         .create(requestScopePropagator, req.psId, refName)
-                        .setPatchSetProvider(
+                        .setPatchSetProvider(req.replaceOp::getPatchSet));
-                            new Provider<PatchSet>() {
-                              @Override
-                              public PatchSet get() {
-                                return req.replaceOp.getPatchSet();
-                              }
-                            }));
                 bu.addOp(id, new ChangeProgressOp(closeProgress));
               }
 

java/com/google/gerrit/server/restapi/config/ListTasks.java

@@ -20,7 +20,6 @@ import com.google.gerrit.extensions.restapi.RestReadView;
 import com.google.gerrit.reviewdb.client.Project;
 import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.config.ConfigResource;
-import com.google.gerrit.server.git.TaskInfoFactory;
 import com.google.gerrit.server.git.WorkQueue;
 import com.google.gerrit.server.git.WorkQueue.ProjectTask;
 import com.google.gerrit.server.git.WorkQueue.Task;
@@ -107,14 +106,7 @@ public class ListTasks implements RestReadView<ConfigResource> {
   }
 
   private List<TaskInfo> getTasks() {
-    List<TaskInfo> taskInfos =
+    List<TaskInfo> taskInfos = workQueue.getTaskInfos(TaskInfo::new);
-        workQueue.getTaskInfos(
-            new TaskInfoFactory<TaskInfo>() {
-              @Override
-              public TaskInfo getTaskInfo(Task<?> task) {
-                return new TaskInfo(task);
-              }
-            });
     Collections.sort(
         taskInfos,
         new Comparator<TaskInfo>() {

java/com/google/gerrit/sshd/SshDaemon.java

@@ -20,7 +20,6 @@ import static java.util.concurrent.TimeUnit.SECONDS;
 import static org.apache.sshd.common.channel.ChannelOutputStream.WAIT_FOR_SPACE_TIMEOUT;
 
 import com.google.common.base.Strings;
-import com.google.common.base.Supplier;
 import com.google.common.collect.Iterables;
 import com.google.gerrit.common.Version;
 import com.google.gerrit.extensions.events.LifecycleListener;
@@ -242,12 +241,7 @@ public class SshDaemon extends SshServer implements SshInfo, LifecycleListener {
         "sshd/sessions/connected",
         Integer.class,
         new Description("Currently connected SSH sessions").setGauge().setUnit("sessions"),
-        new Supplier<Integer>() {
+        connected::get);
-          @Override
-          public Integer get() {
-            return connected.get();
-          }
-        });
 
     final Counter0 sessionsCreated =
         metricMaker.newCounter(

java/com/google/gwtexpui/globalkey/client/GlobalKey.java

@@ -14,6 +14,7 @@
 
 package com.google.gwtexpui.globalkey.client;
 
+import com.google.gwt.event.dom.client.DomEvent;
 import com.google.gwt.event.dom.client.KeyCodes;
 import com.google.gwt.event.dom.client.KeyDownEvent;
 import com.google.gwt.event.dom.client.KeyDownHandler;
@@ -27,13 +28,7 @@ import com.google.gwt.user.client.ui.PopupPanel;
 import com.google.gwt.user.client.ui.Widget;
 
 public class GlobalKey {
-  public static final KeyPressHandler STOP_PROPAGATION =
+  public static final KeyPressHandler STOP_PROPAGATION = DomEvent::stopPropagation;
-      new KeyPressHandler() {
-        @Override
-        public void onKeyPress(KeyPressEvent event) {
-          event.stopPropagation();
-        }
-      };
 
   private static State global;
   static State active;

javatests/com/google/gerrit/server/patch/PatchListTest.java

@@ -23,7 +23,6 @@ import java.io.InputStream;
 import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
 import java.util.Arrays;
-import java.util.Comparator;
 import org.junit.Test;
 
 public class PatchListTest {
@@ -36,16 +35,7 @@ public class PatchListTest {
       Patch.COMMIT_MSG, Patch.MERGE_LIST, "/!xxx", "abc", "def/g", "qrx", "zzz",
     };
 
-    Arrays.sort(
+    Arrays.sort(names, 0, names.length, PatchList::comparePaths);
-        names,
-        0,
-        names.length,
-        new Comparator<String>() {
-          @Override
-          public int compare(String o1, String o2) {
-            return PatchList.comparePaths(o1, o2);
-          }
-        });
     assertThat(names).isEqualTo(want);
   }
 
@@ -58,16 +48,7 @@ public class PatchListTest {
       Patch.COMMIT_MSG, "/!xxx", "abc", "def/g", "qrx", "zzz",
     };
 
-    Arrays.sort(
+    Arrays.sort(names, 0, names.length, PatchList::comparePaths);
-        names,
-        0,
-        names.length,
-        new Comparator<String>() {
-          @Override
-          public int compare(String o1, String o2) {
-            return PatchList.comparePaths(o1, o2);
-          }
-        });
     assertThat(names).isEqualTo(want);
   }