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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.http.server;
import com.google.common.base.Splitter;
import java.util.Iterator;
/**
* Serialization/deserialization class for the result of a single document operation against Vespa.
*
* @author Steinar Knutsen
*/
final class OperationStatus {
public static final String IS_CONDITION_NOT_MET = "IS-CONDITION-NOT-MET";
public final String message;
public final String operationId;
public final ErrorCode errorCode;
public final String traceMessage;
public final boolean isConditionNotMet;
private static final char EOL = '\n';
private static final char SEPARATOR = ' ';
private static final Splitter spaceSep = Splitter.on(SEPARATOR);
/**
* Constructor
* @param message some human readable information what happened
* @param operationId the doc ID for the operation
* @param errorCode if it is success, transitive, or fatal
* @param isConditionNotMet if error is due to condition not met
* @param traceMessage any tracemessage
*/
public OperationStatus(String message, String operationId, ErrorCode errorCode, boolean isConditionNotMet, String traceMessage) {
this.isConditionNotMet = isConditionNotMet;
this.message = message;
this.operationId = operationId;
this.errorCode = errorCode;
this.traceMessage = traceMessage;
}
/**
* Parse a single rendered OperationStatus string. White space may be padded after
* and before the given status.
*
* @param singleLine
* a rendered OperationStatus
* @return an OperationStatus instance reflecting the input
* @throws IllegalArgumentException
* if there are illegal input data characters or the status
* element has no corresponding value in the ErrorCode
* enumeration
*/
public static OperationStatus parse(String singleLine) {
// Do note there is specifically left room for more arguments after
// the first in the serialized form.
Iterator<String> input = spaceSep.split(singleLine.trim()).iterator();
String operationId;
ErrorCode errorCode;
String message;
String traceMessage = "";
operationId = Encoder.decode(input.next(), new StringBuilder())
.toString();
errorCode = ErrorCode.valueOf(Encoder.decode(input.next(),
new StringBuilder()).toString());
message = Encoder.decode(input.next(), new StringBuilder()).toString();
// We are backwards compatible, meaning it is ok not to supply the last argument.
boolean isConditionNotMet = false;
if (message.startsWith(IS_CONDITION_NOT_MET)) {
message = message.replaceFirst(IS_CONDITION_NOT_MET, "");
isConditionNotMet = true;
}
if (input.hasNext()) {
traceMessage = Encoder.decode(input.next(), new StringBuilder()).toString();
}
return new OperationStatus(message, operationId, errorCode, isConditionNotMet, traceMessage);
}
/** Returns a string representing the status. */
public String render() {
StringBuilder s = new StringBuilder();
Encoder.encode(operationId, s).append(SEPARATOR);
Encoder.encode(errorCode.toString(), s).append(SEPARATOR);
Encoder.encode(isConditionNotMet ? IS_CONDITION_NOT_MET + message : message, s).append(SEPARATOR);
Encoder.encode(traceMessage, s).append(EOL);
return s.toString();
}
}
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