List of usage examples for com.google.common.base Functions constant
public static <E> Function<Object, E> constant(@Nullable E value)
From source file:org.sosy_lab.cpachecker.cpa.invariants.formula.ReplaceVisitor.java
/** * Creates a new replace visitor for replacing occurrences of the first given * formula by the second given formula in visited formulae. * * @param pToReplace the formula to be replaced. * @param pReplacement the replacement formula. *//*from w ww . ja v a 2 s . c o m*/ public ReplaceVisitor(BooleanFormula<T> pToReplace, BooleanFormula<T> pReplacement) { this(Predicates.<NumeralFormula<T>>alwaysFalse(), Functions.<NumeralFormula<T>>identity(), pToReplace == null ? Predicates.<BooleanFormula<T>>alwaysFalse() : Predicates.<BooleanFormula<T>>equalTo(pToReplace), Functions.constant(pReplacement)); }
From source file:com.palantir.atlasdb.cli.command.SweepCommand.java
@Override public int execute(final AtlasDbServices services) { SweepTaskRunner sweepRunner = services.getSweepTaskRunner(); if (!((namespace != null) ^ (table != null) ^ sweepAllTables)) { System.err.println("Specify one of --namespace, --table, or --all options."); return 1; }//from w w w . j a va2s . co m if ((namespace != null) && (row != null)) { System.err.println("Cannot specify a start row (" + row + ") when sweeping multiple tables (in namespace " + namespace + ")"); return 1; } Map<TableReference, Optional<byte[]>> tableToStartRow = Maps.newHashMap(); if ((table != null)) { Optional<byte[]> startRow = Optional.of(new byte[0]); if (row != null) { startRow = Optional.of(decodeStartRow(row)); } tableToStartRow.put(TableReference.createUnsafe(table), startRow); } else if (namespace != null) { Set<TableReference> tablesInNamespace = services.getKeyValueService().getAllTableNames().stream() .filter(tableRef -> tableRef.getNamespace().getName().equals(namespace)) .collect(Collectors.toSet()); for (TableReference table : tablesInNamespace) { tableToStartRow.put(table, Optional.of(new byte[0])); } } else if (sweepAllTables) { tableToStartRow.putAll(Maps.asMap(Sets.difference(services.getKeyValueService().getAllTableNames(), AtlasDbConstants.hiddenTables), Functions.constant(Optional.of(new byte[0])))); } for (Map.Entry<TableReference, Optional<byte[]>> entry : tableToStartRow.entrySet()) { final TableReference table = entry.getKey(); Optional<byte[]> startRow = entry.getValue(); final AtomicLong cellsExamined = new AtomicLong(); final AtomicLong cellsDeleted = new AtomicLong(); while (startRow.isPresent()) { Stopwatch watch = Stopwatch.createStarted(); SweepResults results = sweepRunner.run(table, batchSize, startRow.get()); System.out.println(String.format( "Swept from %s to %s in table %s in %d ms, examined %d unique cells, deleted %d cells.", encodeStartRow(startRow), encodeEndRow(results.getNextStartRow()), table, watch.elapsed(TimeUnit.MILLISECONDS), results.getCellsExamined(), results.getCellsDeleted())); startRow = results.getNextStartRow(); cellsDeleted.addAndGet(results.getCellsDeleted()); cellsExamined.addAndGet(results.getCellsExamined()); maybeSleep(); } services.getTransactionManager().runTaskWithRetry((TxTask) t -> { SweepPriorityTable priorityTable = SweepTableFactory.of().getSweepPriorityTable(t); SweepPriorityTable.SweepPriorityRow row1 = SweepPriorityTable.SweepPriorityRow .of(table.getQualifiedName()); priorityTable.putWriteCount(row1, 0L); priorityTable.putCellsDeleted(row1, cellsDeleted.get()); priorityTable.putCellsExamined(row1, cellsExamined.get()); priorityTable.putLastSweepTime(row1, System.currentTimeMillis()); System.out .println(String.format("Finished sweeping %s, examined %d unique cells, deleted %d cells.", table, cellsExamined.get(), cellsDeleted.get())); if (cellsDeleted.get() > 0) { Stopwatch watch = Stopwatch.createStarted(); services.getKeyValueService().compactInternally(table); System.out.println(String.format("Finished performing compactInternally on %s in %d ms.", table, watch.elapsed(TimeUnit.MILLISECONDS))); } return null; }); } return 0; }
From source file:clocker.mesos.entity.MesosSlaveImpl.java
@Override public void connectSensors() { super.connectSensors(); final String id = sensors().get(MESOS_SLAVE_ID); HttpFeed.Builder httpFeedBuilder = HttpFeed.builder().entity(this).period(30, TimeUnit.SECONDS) .baseUri(getMesosCluster().sensors().get(Attributes.MAIN_URI)) .credentialsIfNotNull(config().get(MesosCluster.MESOS_USERNAME), config().get(MesosCluster.MESOS_PASSWORD)) .poll(HttpPollConfig.forSensor(MEMORY_AVAILABLE).suburl("/master/state.json") .onSuccess(Functionals.chain(HttpValueFunctions.jsonContents(), Functions.compose(MesosUtils.selectM(new Predicate<JsonElement>() { @Override public boolean apply(JsonElement input) { return input.getAsJsonObject().get("id").getAsString().equals(id); }//from w w w. j a v a 2 s.c om }), JsonFunctions.walk("slaves")), JsonFunctions.walkM("resources", "mem"), JsonFunctions.castM(Long.class))) .onFailureOrException(Functions.constant(-1L))) .poll(HttpPollConfig.forSensor(CPU_AVAILABLE).suburl("/master/state.json") .onSuccess(Functionals.chain(HttpValueFunctions.jsonContents(), Functions.compose(MesosUtils.selectM(new Predicate<JsonElement>() { @Override public boolean apply(JsonElement input) { return input.getAsJsonObject().get("id").getAsString().equals(id); } }), JsonFunctions.walk("slaves")), JsonFunctions.walkM("resources", "cpus"), JsonFunctions.castM(Double.class))) .onFailureOrException(Functions.constant(-1d))) .poll(HttpPollConfig.forSensor(DISK_AVAILABLE).suburl("/master/state.json") .onSuccess(Functionals.chain(HttpValueFunctions.jsonContents(), Functions.compose(MesosUtils.selectM(new Predicate<JsonElement>() { @Override public boolean apply(JsonElement input) { return input.getAsJsonObject().get("id").getAsString().equals(id); } }), JsonFunctions.walk("slaves")), JsonFunctions.walkM("resources", "disk"), JsonFunctions.castM(Long.class))) .onFailureOrException(Functions.constant(-1L))) .poll(HttpPollConfig.forSensor(MEMORY_USED).suburl("/master/state.json") .onSuccess(Functionals.chain(HttpValueFunctions.jsonContents(), Functions.compose(MesosUtils.selectM(new Predicate<JsonElement>() { @Override public boolean apply(JsonElement input) { return input.getAsJsonObject().get("id").getAsString().equals(id); } }), JsonFunctions.walk("slaves")), JsonFunctions.walkM("used_resources", "mem"), JsonFunctions.castM(Long.class))) .onFailureOrException(Functions.constant(-1L))) .poll(HttpPollConfig.forSensor(CPU_USED).suburl("/master/state.json") .onSuccess(Functionals.chain(HttpValueFunctions.jsonContents(), Functions.compose(MesosUtils.selectM(new Predicate<JsonElement>() { @Override public boolean apply(JsonElement input) { return input.getAsJsonObject().get("id").getAsString().equals(id); } }), JsonFunctions.walk("slaves")), JsonFunctions.walkM("used_resources", "cpus"), JsonFunctions.castM(Double.class))) .onFailureOrException(Functions.constant(-1d))) .poll(HttpPollConfig.forSensor(DISK_USED).suburl("/master/state.json") .onSuccess(Functionals.chain(HttpValueFunctions.jsonContents(), Functions.compose(MesosUtils.selectM(new Predicate<JsonElement>() { @Override public boolean apply(JsonElement input) { return input.getAsJsonObject().get("id").getAsString().equals(id); } }), JsonFunctions.walk("slaves")), JsonFunctions.walkM("used_resources", "disk"), JsonFunctions.castM(Long.class))) .onFailureOrException(Functions.constant(-1L))); httpFeed = httpFeedBuilder.build(); }
From source file:org.apache.brooklyn.core.sensor.ssh.SshCommandSensor.java
@Override public void apply(final EntityLocal entity) { super.apply(entity); if (LOG.isDebugEnabled()) { LOG.debug("Adding SSH sensor {} to {}", name, entity); }/*from w ww. j a v a 2 s . c o m*/ Supplier<Map<String, String>> envSupplier = new Supplier<Map<String, String>>() { @Override public Map<String, String> get() { return MutableMap .copyOf(Strings.toStringMap(entity.getConfig(BrooklynConfigKeys.SHELL_ENVIRONMENT), "")); } }; Supplier<String> commandSupplier = new Supplier<String>() { @Override public String get() { return makeCommandExecutingInDirectory(command, executionDir, entity); } }; SshPollConfig<T> pollConfig = new SshPollConfig<T>(sensor).period(period).env(envSupplier) .command(commandSupplier).checkSuccess(SshValueFunctions.exitStatusEquals(0)) .onFailureOrException(Functions.constant((T) null)) .onSuccess(Functions.compose(new Function<String, T>() { @Override public T apply(String input) { return TypeCoercions.coerce(input, getType(type)); } }, SshValueFunctions.stdout())); SshFeed.builder().entity(entity).onlyIfServiceUp().poll(pollConfig).build(); }
From source file:com.eucalyptus.compute.common.internal.tags.Tag.java
@SuppressWarnings("unchecked") public static Tag withOwner(@Nonnull final OwnerFullName ownerFullName) { Preconditions.checkNotNull(ownerFullName, "ownerFullName"); return new Tag(null, Functions.constant(null), ownerFullName, null, null); }
From source file:brooklyn.entity.cloudfoundry.webapp.CloudFoundryWebAppImpl.java
/** * For connecting the {@link #DISK} sensor. * <p>//from ww w. j av a 2 s . c om * Should be called inside {@link #connectSensors()}. * * @see #disconnectDiskQuotaSensor() */ protected void connectDiskQuotaSensor() { usedDisk = FunctionFeed.builder().entity(this).period(Duration.seconds(2)) .poll(new FunctionPollConfig<Integer, Integer>(DISK).onException(Functions.constant(0)) .callable(new Callable<Integer>() { public Integer call() { return getDriver().getDisk(); } })) .build(); }
From source file:com.facebook.buck.distributed.DistBuildFileHashes.java
public DistBuildFileHashes(ActionGraph actionGraph, final SourcePathResolver sourcePathResolver, SourcePathRuleFinder ruleFinder, final FileHashCache rootCellFileHashCache, final Function<? super Path, Integer> cellIndexer, ListeningExecutorService executorService, final int keySeed, final BuckConfig buckConfig) { this.remoteFileHashes = CacheBuilder.newBuilder() .build(new CacheLoader<ProjectFilesystem, BuildJobStateFileHashes>() { @Override/*from w w w. j av a2s.c o m*/ public BuildJobStateFileHashes load(ProjectFilesystem filesystem) throws Exception { BuildJobStateFileHashes fileHashes = new BuildJobStateFileHashes(); fileHashes.setCellIndex(cellIndexer.apply(filesystem.getRootPath())); return fileHashes; } }); this.fileHashLoaders = CacheBuilder.newBuilder() .build(new CacheLoader<ProjectFilesystem, FileHashLoader>() { @Override public FileHashLoader load(ProjectFilesystem key) throws Exception { return new RecordingFileHashLoader( new StackedFileHashCache(ImmutableList.of(rootCellFileHashCache, DefaultFileHashCache.createDefaultFileHashCache(key))), key, remoteFileHashes.get(key), new DistBuildConfig(buckConfig)); } }); this.ruleKeyFactories = createRuleKeyFactories(sourcePathResolver, ruleFinder, fileHashLoaders, keySeed); this.ruleKeys = ruleKeyComputation(actionGraph, this.ruleKeyFactories, executorService); this.fileHashes = fileHashesComputation(Futures.transform(this.ruleKeys, Functions.constant(null)), this.remoteFileHashes, executorService); }
From source file:edu.uci.ics.jung.algorithms.shortestpath.DijkstraDistance.java
/** * <p>Creates an instance of <code>DijkstraShortestPath</code> for * the specified unweighted graph (that is, all weights 1) which * caches results locally./*from w ww . j a v a2 s. c o m*/ * * @param g the graph on which distances will be calculated */ public DijkstraDistance(Graph<V, E> g) { this(g, Functions.constant(1), true); }
From source file:org.openrdf.sail.solr.SolrIndex.java
protected Function<? super String, ? extends SpatialContext> createSpatialContextMapper( Map<String, String> parameters) { // this should really be based on the schema ClassLoader classLoader = Thread.currentThread().getContextClassLoader(); SpatialContext geoContext = SpatialContextFactory.makeSpatialContext(parameters, classLoader); return Functions.constant(geoContext); }
From source file:edu.uci.ics.jung.samples.AnimatingAddNodeDemo.java
@Override public void init() { //create a graph Graph<Number, Number> ig = Graphs .<Number, Number>synchronizedDirectedGraph(new DirectedSparseMultigraph<Number, Number>()); ObservableGraph<Number, Number> og = new ObservableGraph<Number, Number>(ig); og.addGraphEventListener(new GraphEventListener<Number, Number>() { public void handleGraphEvent(GraphEvent<Number, Number> evt) { System.err.println("got " + evt); }/*from www .j ava 2 s . c o m*/ }); this.g = og; //create a graphdraw layout = new FRLayout<Number, Number>(g); layout.setSize(new Dimension(600, 600)); Relaxer relaxer = new VisRunner((IterativeContext) layout); relaxer.stop(); relaxer.prerelax(); Layout<Number, Number> staticLayout = new StaticLayout<Number, Number>(g, layout); vv = new VisualizationViewer<Number, Number>(staticLayout, new Dimension(600, 600)); JRootPane rp = this.getRootPane(); rp.putClientProperty("defeatSystemEventQueueCheck", Boolean.TRUE); getContentPane().setLayout(new BorderLayout()); getContentPane().setBackground(java.awt.Color.lightGray); getContentPane().setFont(new Font("Serif", Font.PLAIN, 12)); vv.setGraphMouse(new DefaultModalGraphMouse<Number, Number>()); vv.getRenderer().getVertexLabelRenderer().setPosition(Renderer.VertexLabel.Position.CNTR); vv.getRenderContext().setVertexLabelTransformer(new ToStringLabeller()); vv.setForeground(Color.white); vv.addComponentListener(new ComponentAdapter() { /** * @see java.awt.event.ComponentAdapter#componentResized(java.awt.event.ComponentEvent) */ @Override public void componentResized(ComponentEvent arg0) { super.componentResized(arg0); System.err.println("resized"); layout.setSize(arg0.getComponent().getSize()); } }); getContentPane().add(vv); switchLayout = new JButton("Switch to SpringLayout"); switchLayout.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae) { Dimension d = vv.getSize();//new Dimension(600,600); if (switchLayout.getText().indexOf("Spring") > 0) { switchLayout.setText("Switch to FRLayout"); layout = new SpringLayout<Number, Number>(g, Functions.constant(EDGE_LENGTH)); layout.setSize(d); Relaxer relaxer = new VisRunner((IterativeContext) layout); relaxer.stop(); relaxer.prerelax(); StaticLayout<Number, Number> staticLayout = new StaticLayout<Number, Number>(g, layout); LayoutTransition<Number, Number> lt = new LayoutTransition<Number, Number>(vv, vv.getGraphLayout(), staticLayout); Animator animator = new Animator(lt); animator.start(); vv.repaint(); } else { switchLayout.setText("Switch to SpringLayout"); layout = new FRLayout<Number, Number>(g, d); layout.setSize(d); Relaxer relaxer = new VisRunner((IterativeContext) layout); relaxer.stop(); relaxer.prerelax(); StaticLayout<Number, Number> staticLayout = new StaticLayout<Number, Number>(g, layout); LayoutTransition<Number, Number> lt = new LayoutTransition<Number, Number>(vv, vv.getGraphLayout(), staticLayout); Animator animator = new Animator(lt); animator.start(); vv.repaint(); } } }); getContentPane().add(switchLayout, BorderLayout.SOUTH); timer = new Timer(); }