MetricVisitor.java

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package org.apache.doris.metric;

import org.apache.doris.monitor.jvm.JvmStats;

import com.codahale.metrics.Histogram;

/*
 * MetricVisitor will visit the metrics in metric repo and print them in StringBuilder
 */
public abstract class MetricVisitor {

    // for FE metrics
    public static final String FE_PREFIX = "doris_fe_";
    // for system metrics
    public static final String SYS_PREFIX = "system_";

    protected StringBuilder sb = new StringBuilder();

    public MetricVisitor() {
    }

    public abstract void visitJvm(JvmStats jvmStats);

    public abstract void visit(String prefix, Metric metric);

    public abstract void visitHistogram(String prefix, String name, Histogram histogram);

    public abstract void visitNodeInfo();

    public abstract void visitCloudTableStats();

    public abstract void visitWorkloadGroup();

    public String finish() {
        return sb.toString();
    }
}