/*
* Copyright 2013 Peter Lawrey
*
* 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.higherfrequencytrading.chronicle.tcp.gw;
import com.higherfrequencytrading.chronicle.Excerpt;
import com.higherfrequencytrading.chronicle.impl.WrappedExcerpt;
import org.jetbrains.annotations.NotNull;
import java.io.PrintWriter;
import java.io.StringWriter;
/**
* @author peter.lawrey
*/
public class GatewayEntryWriter {
static final int HEADER_LENGTH = 8 + 8 + 8 + 3 + 1;
@NotNull
private final Excerpt excerpt;
public GatewayEntryWriter(Excerpt excerpt) {
this.excerpt = new WrappedExcerpt(excerpt) {
@Override
public void finish() {
writeInt24(HEADER_LENGTH - 4, position() - HEADER_LENGTH);
super.finish();
}
};
}
public void onException(@NotNull String message, @NotNull Throwable t) {
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
t.printStackTrace(pw);
String text = sw.toString();
Excerpt excerpt = startExceprt(2 + message.length() + 2 + text.length(), 'X');
excerpt.writeUTF(message);
excerpt.writeUTF(text);
excerpt.finish();
}
@NotNull
public Excerpt startExceprt(int capacity, char type) {
excerpt.startExcerpt(HEADER_LENGTH + capacity);
excerpt.writeLong(System.currentTimeMillis());
excerpt.writeLong(System.nanoTime());
excerpt.writeLong(0L); // read timestamp
excerpt.writeInt24(0); // the length.
excerpt.writeByte(type); // the message type.
return excerpt;
}
}