com.alibaba.metrics.reporter.opentsdb.OpenTsdbMetric Maven / Gradle / Ivy

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/*
 * Copyright 2014 the original author or authors.
 *
 * 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.alibaba.metrics.reporter.opentsdb;

import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

/**
 *         
 *         Representation of a metric.
 */
public class OpenTsdbMetric {

    /*
     * { "metric": "sys.cpu.nice", "timestamp": 1346846400, "value": 18, "tags":
     * { "host": "web01", "dc": "lga" } }
     *
     */

    private OpenTsdbMetric() {
    }

    public static Builder named(String name) {
        return new Builder(name);
    }

    private String metric;

    private Long timestamp;

    private Object value;

    private Map tags = new HashMap();

    @Override
    public boolean equals(Object o) {

        if (o == this) {
            return true;
        }

        if (!(o instanceof OpenTsdbMetric)) {
            return false;
        }

        final OpenTsdbMetric rhs = (OpenTsdbMetric) o;

        return equals(metric, rhs.metric) && equals(timestamp, rhs.timestamp) && equals(value, rhs.value)
                && equals(tags, rhs.tags);
    }

    @Override
    public int hashCode() {
        return Arrays.hashCode(new Object[] { metric, timestamp, value, tags });
    }

    public static class Builder {

        private final OpenTsdbMetric metric;

        public Builder(String name) {
            this.metric = new OpenTsdbMetric();
            metric.metric = name;
        }

        public OpenTsdbMetric build() {
            return metric;
        }

        public Builder withValue(Object value) {
            metric.value = value;
            return this;
        }

        public Builder withTimestamp(Long timestamp) {
            metric.timestamp = timestamp;
            return this;
        }

        public Builder withTags(Map tags) {
            if (tags != null) {
                metric.tags.putAll(tags);
            }
            return this;
        }
    }

    @Override
    public String toString() {
        return this.getClass().getSimpleName() + "->metric: " + metric + ",value: " + value + ",timestamp: " + timestamp
                + ",tags: " + tags;
    }

    public String getMetric() {
        return metric;
    }

    public Long getTimestamp() {
        return timestamp;
    }

    public Object getValue() {
        return value;
    }

    public Map getTags() {
        return tags;
    }

    private boolean equals(Object a, Object b) {
        return (a == b) || (a != null && a.equals(b));
    }
}