com.northernwall.hadrian.handlers.utility.HealthWriter Maven / Gradle / Ivy

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package com.northernwall.hadrian.handlers.utility;

import java.io.IOException;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.time.OffsetDateTime;
import java.time.ZoneId;
import java.util.Date;

public class HealthWriter {

    private final OutputStream stream;

    public HealthWriter(OutputStream stream) {
        this.stream = stream;
    }

    private void writeln(String text) throws IOException {
        stream.write(text.getBytes());
    }

    public void open() throws IOException {
        writeln("");
        writeln("");
        writeln("");
    }

    public void close() throws IOException {
        writeln("");
        writeln("");
        writeln("");
        stream.close();
    }

    public void addStringLine(String label, String value) throws IOException {
        if (value == null) {
            writeln("" + label + "-- NULL --");
        } else if (value.isEmpty()) {
            writeln("" + label + "-- EMPTY --");
        } else {
            writeln("" + label + "" + value + "");
        }
    }

    public void addDateTimeLine(String label, OffsetDateTime value) throws IOException {
        if (value == null) {
            addStringLine(label, null);
        } else {
            addStringLine(label, value.toString() + " or " + value.atZoneSameInstant(ZoneId.of("UTC")).toString());
        }
    }

    public void addDateLine(String label, Date value) throws IOException {
        if (value == null) {
            addStringLine(label, null);
        } else {
            addStringLine(label, new SimpleDateFormat("yyyy-MM-dd HH:mm:ssZ").format(value));
        }
    }

    public void addIntLine(String label, int value) throws IOException {
        addStringLine(label, Integer.toString(value));
    }

    void addClassLine(String label, Object value) throws IOException {
        if (value == null) {
            addStringLine(label, null);
        } else {
            addStringLine(label, value.getClass().getCanonicalName());
        }
    }

}