001/*
002 * jPOS Project [http://jpos.org]
003 * Copyright (C) 2000-2026 jPOS Software SRL
004 *
005 * This program is free software: you can redistribute it and/or modify
006 * it under the terms of the GNU Affero General Public License as
007 * published by the Free Software Foundation, either version 3 of the
008 * License, or (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013 * GNU Affero General Public License for more details.
014 *
015 * You should have received a copy of the GNU Affero General Public License
016 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
017 */
018
019package org.jpos.log.render;
020
021import com.fasterxml.jackson.core.JsonGenerator;
022import com.fasterxml.jackson.databind.JsonSerializer;
023import com.fasterxml.jackson.databind.SerializerProvider;
024
025import java.io.ByteArrayOutputStream;
026import java.io.IOException;
027import java.io.PrintStream;
028
029/** Jackson serializer that renders a {@link Throwable} as {@code {message, stacktrace}}. */
030public class ThrowableSerializer extends JsonSerializer<Throwable> {
031    /** Default constructor used by Jackson registration. */
032    public ThrowableSerializer() {}
033    @Override
034    public void serialize(Throwable t, JsonGenerator gen, SerializerProvider serializers) throws IOException {
035        gen.writeStartObject();
036        gen.writeStringField("message", t.getMessage());
037        gen.writeStringField("stacktrace", toString(t));
038        gen.writeEndObject();
039    }
040
041    private String toString (Throwable t) {
042        ByteArrayOutputStream baos = new ByteArrayOutputStream();
043        PrintStream ps = new PrintStream(baos);
044        t.printStackTrace(ps);
045        return baos.toString();
046    }
047}