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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.feedhandler;
import com.yahoo.clientmetrics.RouteMetricSet;
import com.yahoo.container.jdisc.HttpResponse;
import com.yahoo.container.jdisc.VespaHeaders;
import com.yahoo.documentapi.messagebus.protocol.DocumentProtocol;
import com.yahoo.documentapi.messagebus.protocol.PutDocumentMessage;
import com.yahoo.documentapi.messagebus.protocol.RemoveDocumentMessage;
import com.yahoo.documentapi.messagebus.protocol.UpdateDocumentMessage;
import com.yahoo.feedapi.SharedSender;
import com.yahoo.messagebus.Error;
import com.yahoo.messagebus.ErrorCode;
import com.yahoo.messagebus.Message;
import com.yahoo.messagebus.Reply;
import com.yahoo.search.result.ErrorMessage;
import com.yahoo.text.Utf8String;
import com.yahoo.text.XMLWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Logger;
import java.util.stream.Stream;
public final class FeedResponse extends HttpResponse implements SharedSender.ResultCallback {
private final static Logger log = Logger.getLogger(FeedResponse.class.getName());
private final List<ErrorMessage> errorMessages = new ArrayList<>();
private final List<String> errors = new ArrayList<>();
private final StringBuilder traces = new StringBuilder();
private final RouteMetricSet metrics;
private boolean abortOnError = false;
private boolean isAborted = false;
private final SharedSender.Pending pendingNumber = new SharedSender.Pending();
FeedResponse(RouteMetricSet metrics) {
super(com.yahoo.jdisc.http.HttpResponse.Status.OK);
this.metrics = metrics;
}
public boolean isAborted() {
return isAborted;
}
void setAbortOnFeedError(boolean abort) {
abortOnError = abort;
}
@Override
public void render(OutputStream outputStream) throws IOException {
if ( ! errorMessages.isEmpty())
setStatus(VespaHeaders.getStatus(false, errorMessages.get(0), errorMessages.iterator()));
XMLWriter writer = new XMLWriter(new OutputStreamWriter(outputStream));
writer.openTag("result");
if (traces.length() > 0) {
writer.openTag("trace");
writer.append(traces);
writer.closeTag();
}
if (!errors.isEmpty()) {
writer.openTag("errors");
writer.attribute(new Utf8String("count"), errors.size());
for (int i = 0; i < errors.size() && i < 10; ++i) {
writer.openTag("error");
writer.attribute(new Utf8String("message"), errors.get(i));
writer.closeTag();
}
writer.closeTag();
}
writer.closeTag();
writer.flush();
outputStream.close();
}
@Override
public java.lang.String getContentType() {
return "application/xml";
}
private String prettyPrint(Message m) {
if (m instanceof PutDocumentMessage) {
return "PUT[" + ((PutDocumentMessage)m).getDocumentPut().getDocument().getId() + "] ";
}
if (m instanceof RemoveDocumentMessage) {
return "REMOVE[" + ((RemoveDocumentMessage)m).getDocumentId() + "] ";
}
if (m instanceof UpdateDocumentMessage) {
return "UPDATE[" + ((UpdateDocumentMessage)m).getDocumentUpdate().getId() + "] ";
}
return "";
}
public synchronized boolean handleReply(Reply reply) {
metrics.addReply(reply);
if (reply.getTrace().getLevel() > 0) {
String str = reply.getTrace().toString();
traces.append(str);
System.out.println(str);
}
if (containsFatalErrors(reply.getErrors())) {
for (int i = 0; i < reply.getNumErrors(); ++i) {
Error err = reply.getError(i);
StringBuilder out = new StringBuilder(prettyPrint(reply.getMessage()));
out.append("[").append(DocumentProtocol.getErrorName(err.getCode())).append("] ");
if (err.getService() != null) {
out.append("(").append(err.getService()).append(") ");
}
out.append(err.getMessage());
String str = out.toString();
log.finest(str);
addError(convertErrorCode(err.getCode()), str);
}
if (abortOnError) {
isAborted = true;
return false;
}
}
return true;
}
public SharedSender.Pending getPending() { return pendingNumber; }
public void done() {
metrics.done();
}
FeedResponse addXMLParseError(String error) {
errorMessages.add(ErrorMessage.createBadRequest(error));
errors.add(error);
return this;
}
public FeedResponse addError(com.yahoo.container.protect.Error code, String error) {
errorMessages.add(new ErrorMessage(code.code, error));
errors.add(error);
return this;
}
public List<String> getErrorList() {
return errors;
}
private static boolean containsFatalErrors(Stream<Error> errors) {
return errors.anyMatch(e -> e.getCode() != DocumentProtocol.ERROR_TEST_AND_SET_CONDITION_FAILED);
}
private static com.yahoo.container.protect.Error convertErrorCode(int error) {
// We should try to enumerate these error a bit finer.
// Like busy, no space etc.
if (error == DocumentProtocol.ERROR_NO_SPACE) {
return com.yahoo.container.protect.Error.INSUFFICIENT_STORAGE;
} else if (isTransientError(error)) {
return com.yahoo.container.protect.Error.INTERNAL_SERVER_ERROR;
} if (isFatalError(error)) {
return com.yahoo.container.protect.Error.INTERNAL_SERVER_ERROR;
}
return com.yahoo.container.protect.Error.INTERNAL_SERVER_ERROR;
}
private static boolean isFatalError(int error) {
return (error >= ErrorCode.FATAL_ERROR) && (error < ErrorCode.ERROR_LIMIT);
}
private static boolean isTransientError(int error) {
return (error >= ErrorCode.TRANSIENT_ERROR) && (error < ErrorCode.FATAL_ERROR);
}
public boolean isSuccess() {
return errors.isEmpty();
}
}
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