Java tutorial
/* * Copyright 2011 Proofpoint, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.proofpoint.event.monitor; import com.google.common.annotations.VisibleForTesting; import com.google.common.base.Function; import com.google.common.base.Preconditions; import com.google.common.collect.ImmutableMap; import com.google.common.collect.Iterables; import org.codehaus.jackson.annotate.JsonProperty; import javax.annotation.Nullable; import javax.inject.Inject; import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.PathParam; import javax.ws.rs.Produces; import javax.ws.rs.core.Context; import javax.ws.rs.core.MediaType; import javax.ws.rs.core.Response; import javax.ws.rs.core.UriInfo; import java.net.URI; import java.util.Map; import java.util.Set; @Path("/v1/monitor") public class MonitorsResource { private final Map<String, Monitor> monitors; @Inject public MonitorsResource(Set<Monitor> monitors) { ImmutableMap.Builder<String, Monitor> monitorBuilder = ImmutableMap.builder(); for (Monitor monitor : monitors) { monitorBuilder.put(monitor.getName(), monitor); } this.monitors = monitorBuilder.build(); } @GET @Produces(MediaType.APPLICATION_JSON) public Iterable<MonitorRepresentation> getAll(@Context final UriInfo uriInfo) { return Iterables.transform(monitors.values(), new Function<Monitor, MonitorRepresentation>() { @Override public MonitorRepresentation apply(@Nullable Monitor monitor) { return MonitorRepresentation.of(monitor, uriInfo); } }); } @GET @Path("/{monitor}") @Produces(MediaType.APPLICATION_JSON) public Response getMonitorRepresentation(@PathParam("monitor") final String monitorName, @Context UriInfo uriInfo) { Monitor monitor = monitors.get(monitorName); if (monitor == null) { return Response.status(Response.Status.NOT_FOUND).build(); } return Response.ok(MonitorRepresentation.of(monitor, uriInfo)).build(); } @VisibleForTesting static class MonitorRepresentation { private final String name; private final boolean ok; private final Double minimumOneMinuteRate; private final Double maximumOneMinuteRate; private final double oneMinuteRate; private final double fiveMinuteRate; private final double fifteenMinuteRate; private final URI self; static MonitorRepresentation of(Monitor monitor, UriInfo context) { Preconditions.checkNotNull(monitor, "Monitor is null"); CounterStat stats = Preconditions.checkNotNull(monitor.getEvents(), "monitor.getEvents() is null"); return new MonitorRepresentation(monitor.getName(), !monitor.isFailed(), monitor.getMinimumOneMinuteRate(), monitor.getMaximumOneMinuteRate(), stats.getOneMinuteRate(), stats.getFiveMinuteRate(), stats.getFiveMinuteRate(), selfUri(monitor, context)); } private MonitorRepresentation(String name, boolean ok, Double minimumOneMinuteRate, Double maximumOneMinuteRate, double oneMinuteRate, double fiveMinuteRate, double fifteenMinuteRate, URI self) { this.name = name; this.ok = ok; this.minimumOneMinuteRate = minimumOneMinuteRate; this.maximumOneMinuteRate = maximumOneMinuteRate; this.oneMinuteRate = oneMinuteRate; this.fiveMinuteRate = fiveMinuteRate; this.fifteenMinuteRate = fifteenMinuteRate; this.self = self; } @JsonProperty public String getName() { return name; } @JsonProperty public boolean isOk() { return ok; } @JsonProperty public Double getMinimumOneMinuteRate() { return minimumOneMinuteRate; } @JsonProperty public Double getMaximumOneMinuteRate() { return maximumOneMinuteRate; } @JsonProperty public double getOneMinuteRate() { return oneMinuteRate; } @JsonProperty public double getFiveMinuteRate() { return fiveMinuteRate; } @JsonProperty public double getFifteenMinuteRate() { return fifteenMinuteRate; } @JsonProperty public URI getSelf() { return self; } @Override public boolean equals(Object o) { if (this == o) { return true; } if (o == null || getClass() != o.getClass()) { return false; } MonitorRepresentation that = (MonitorRepresentation) o; if (Double.compare(that.fifteenMinuteRate, fifteenMinuteRate) != 0) { return false; } if (Double.compare(that.fiveMinuteRate, fiveMinuteRate) != 0) { return false; } if (ok != that.ok) { return false; } if (Double.compare(that.oneMinuteRate, oneMinuteRate) != 0) { return false; } if (maximumOneMinuteRate != null ? !maximumOneMinuteRate.equals(that.maximumOneMinuteRate) : that.maximumOneMinuteRate != null) { return false; } if (minimumOneMinuteRate != null ? !minimumOneMinuteRate.equals(that.minimumOneMinuteRate) : that.minimumOneMinuteRate != null) { return false; } if (name != null ? !name.equals(that.name) : that.name != null) { return false; } if (self != null ? !self.equals(that.self) : that.self != null) { return false; } return true; } @Override public int hashCode() { int result; long temp; result = name != null ? name.hashCode() : 0; result = 31 * result + (ok ? 1 : 0); result = 31 * result + (minimumOneMinuteRate != null ? minimumOneMinuteRate.hashCode() : 0); result = 31 * result + (maximumOneMinuteRate != null ? maximumOneMinuteRate.hashCode() : 0); temp = oneMinuteRate != +0.0d ? Double.doubleToLongBits(oneMinuteRate) : 0L; result = 31 * result + (int) (temp ^ (temp >>> 32)); temp = fiveMinuteRate != +0.0d ? Double.doubleToLongBits(fiveMinuteRate) : 0L; result = 31 * result + (int) (temp ^ (temp >>> 32)); temp = fifteenMinuteRate != +0.0d ? Double.doubleToLongBits(fifteenMinuteRate) : 0L; result = 31 * result + (int) (temp ^ (temp >>> 32)); result = 31 * result + (self != null ? self.hashCode() : 0); return result; } } private static URI selfUri(Monitor monitor, UriInfo uriInfo) { return uriInfo.getBaseUriBuilder().path("/v1/monitor/{monitor}").build(monitor.getName()); } }