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The Java operations layer for the MongoDB Java Driver.
Third parties can wrap this layer to provide custom higher-level APIs
/*
* Copyright 2008-present MongoDB, Inc.
*
* 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.mongodb;
import com.mongodb.lang.Nullable;
import org.bson.BsonArray;
import org.bson.BsonDocument;
import org.bson.BsonValue;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import static com.mongodb.assertions.Assertions.notNull;
/**
* Top level Exception for all Exceptions, server-side or client-side, that come from the driver.
* @serial exclude
*/
public class MongoException extends RuntimeException {
/**
* An error label indicating that the exception can be treated as a transient transaction error.
*
* @see #hasErrorLabel(String)
* @since 3.8
*/
public static final String TRANSIENT_TRANSACTION_ERROR_LABEL = "TransientTransactionError";
/**
* An error label indicating that the exception can be treated as an unknown transaction commit result.
*
* @see #hasErrorLabel(String)
* @since 3.8
*/
public static final String UNKNOWN_TRANSACTION_COMMIT_RESULT_LABEL = "UnknownTransactionCommitResult";
private static final long serialVersionUID = -4415279469780082174L;
private final int code;
private final Set errorLabels = new HashSet<>();
/**
* Static helper to create or cast a MongoException from a throwable
*
* @param t a throwable, which may be null
* @return a MongoException
*/
@Nullable
public static MongoException fromThrowable(@Nullable final Throwable t) {
if (t == null) {
return null;
} else {
return fromThrowableNonNull(t);
}
}
/**
* Static helper to create or cast a MongoException from a throwable
*
* @param t a throwable, which may not be null
* @return a MongoException
* @since 3.7
*/
public static MongoException fromThrowableNonNull(final Throwable t) {
if (t instanceof MongoException) {
return (MongoException) t;
} else {
return new MongoException(t.getMessage(), t);
}
}
/**
* @param msg the message
*/
public MongoException(final String msg) {
super(msg);
code = -3;
}
/**
* @param code the error code
* @param msg the message
*/
public MongoException(final int code, final String msg) {
super(msg);
this.code = code;
}
/**
* @param msg the message
* @param t the throwable cause
*/
public MongoException(@Nullable final String msg, @Nullable final Throwable t) {
super(msg, t);
code = -4;
}
/**
* @param code the error code
* @param msg the message
* @param t the throwable cause
*/
public MongoException(final int code, final String msg, final Throwable t) {
super(msg, t);
this.code = code;
if (t instanceof MongoException) {
addLabels(((MongoException) t).getErrorLabels());
}
}
/**
* @param code the error code
* @param msg the message
* @param response the response
* @since 4.1
*/
public MongoException(final int code, final String msg, final BsonDocument response) {
super(msg);
this.code = code;
addLabels(response.getArray("errorLabels", new BsonArray()));
}
/**
* Gets the exception code
*
* @return the error code.
*/
public int getCode() {
return code;
}
/**
* Adds the given error label to the exception.
*
* @param errorLabel the non-null error label to add to the exception
*
* @since 3.8
*/
public void addLabel(final String errorLabel) {
notNull("errorLabel", errorLabel);
errorLabels.add(errorLabel);
}
/**
* Removes the given error label from the exception.
*
* @param errorLabel the non-null error label to remove from the exception
*
* @since 3.8
*/
public void removeLabel(final String errorLabel) {
notNull("errorLabel", errorLabel);
errorLabels.remove(errorLabel);
}
/**
* Gets the set of error labels associated with this exception.
*
* @return the error labels, which may not be null but may be empty
* @since 3.8
*/
public Set getErrorLabels() {
return Collections.unmodifiableSet(errorLabels);
}
/**
* Return true if the exception is labelled with the given error label, and false otherwise.
*
* @param errorLabel the non-null error label
* @return true if the exception is labelled with the given error label
* @since 3.8
*/
public boolean hasErrorLabel(final String errorLabel) {
notNull("errorLabel", errorLabel);
return errorLabels.contains(errorLabel);
}
/**
* Add labels.
*
* @param labels the labels
*/
protected void addLabels(final BsonArray labels) {
for (final BsonValue errorLabel : labels) {
addLabel(errorLabel.asString().getValue());
}
}
/**
* Add labels.
*
* @param labels the labels
*/
protected void addLabels(final Collection labels) {
for (final String errorLabel : labels) {
addLabel(errorLabel);
}
}
}
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