Java tutorial
/** * Copyright 2016 Smoke Turner, LLC. * * 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.smoketurner.notification.application.config; import java.util.Objects; import javax.annotation.Nonnull; import javax.validation.constraints.Max; import javax.validation.constraints.Min; import javax.validation.constraints.NotNull; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.codahale.metrics.Gauge; import com.codahale.metrics.MetricRegistry; import com.fasterxml.jackson.annotation.JsonIgnore; import com.fasterxml.jackson.annotation.JsonProperty; import com.ge.snowizard.core.IdWorker; import com.smoketurner.notification.application.NotificationApplication; import io.dropwizard.setup.Environment; public class SnowizardConfiguration { private static final Logger LOGGER = LoggerFactory.getLogger(SnowizardConfiguration.class); @Min(1) @Max(31) @NotNull private Integer datacenterId; @Min(1) @Max(31) @NotNull private Integer workerId; @NotNull private Boolean enabled = Boolean.FALSE; @JsonProperty public Integer getDatacenterId() { return datacenterId; } @JsonProperty public void setDatacenterId(final int datacenterId) { this.datacenterId = datacenterId; } @JsonProperty public Integer getWorkerId() { return workerId; } @JsonProperty public void setWorkerId(final int workerId) { this.workerId = workerId; } @JsonProperty public boolean isEnabled() { return enabled; } @JsonProperty public void setEnabled(final boolean enabled) { this.enabled = enabled; } @JsonIgnore public IdWorker build(@Nonnull final Environment environment) { Objects.requireNonNull(environment); final MetricRegistry registry = environment.metrics(); registry.register(MetricRegistry.name(NotificationApplication.class, "worker_id"), new Gauge<Integer>() { @Override public Integer getValue() { return workerId; } }); registry.register(MetricRegistry.name(NotificationApplication.class, "datacenter_id"), new Gauge<Integer>() { @Override public Integer getValue() { return datacenterId; } }); LOGGER.info("Worker ID: {}, Datacenter ID: {}", workerId, datacenterId); return new IdWorker(workerId, datacenterId, 0, false, registry); } }