/
InboundExceptionEvent.java
74 lines (68 loc) · 2.8 KB
/
InboundExceptionEvent.java
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/*
* Copyright (c) 2020-2021 Heiko Bornholdt and Kevin Röbert
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
* OR OTHER DEALINGS IN THE SOFTWARE.
*/
package org.drasyl.node.event;
import com.google.auto.value.AutoValue;
import org.drasyl.util.internal.NonNull;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
/**
* This event signals that the node was unable to process an inbound message. Both application-level
* messages and internal drasyl signaling messages can trigger this event. The occurrence of this
* event does not necessarily indicate a bug, it could also be caused by bots/crawlers sending
* unreadable messages.
* <p>
* This is an immutable object.
*/
@SuppressWarnings("java:S118")
@AutoValue
public abstract class InboundExceptionEvent implements Event {
@Override
public String toString() {
try {
final StringWriter stringWriter = new StringWriter();
final PrintWriter printWriter = new PrintWriter(stringWriter);
getError().printStackTrace(printWriter);
printWriter.flush();
final String error = stringWriter.toString();
stringWriter.close();
printWriter.close();
return "InboundExceptionEvent{error='" + error + "'}";
}
catch (final IOException e) {
return "InboundExceptionEvent{error='" + getError() + "'}";
}
}
/**
* Returns the exception why the message could not be processed.
*
* @return the exception why the message could not be processed.
*/
@NonNull
public abstract Throwable getError();
/**
* @throws NullPointerException if {@code error} is {@code null}
*/
public static InboundExceptionEvent of(final Throwable error) {
return new AutoValue_InboundExceptionEvent(error);
}
}