org.apache.cassandra.service.ClientWarn Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of cassandra-all Show documentation
Show all versions of cassandra-all Show documentation
A fork of the Apache Cassandra Project ready to embed Elasticsearch.
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.cassandra.service;
import java.util.ArrayList;
import java.util.List;
import org.apache.cassandra.concurrent.ExecutorLocal;
import org.apache.cassandra.utils.FBUtilities;
public class ClientWarn implements ExecutorLocal
{
private static final String TRUNCATED = " [truncated]";
private static final ThreadLocal warnLocal = new ThreadLocal<>();
public static ClientWarn instance = new ClientWarn();
private ClientWarn()
{
}
public State get() {
return warnLocal.get();
}
public void set(State value) {
warnLocal.set(value);
}
public void warn(String text)
{
State state = warnLocal.get();
if (state != null)
state.add(text);
}
public void captureWarnings()
{
warnLocal.set(new State());
}
public List getWarnings()
{
State state = warnLocal.get();
if (state == null || state.warnings.isEmpty())
return null;
return state.warnings;
}
public void resetWarnings()
{
warnLocal.remove();
}
public static class State
{
private final List warnings = new ArrayList<>();
private void add(String warning)
{
if (warnings.size() < FBUtilities.MAX_UNSIGNED_SHORT)
warnings.add(maybeTruncate(warning));
}
private static String maybeTruncate(String warning)
{
return warning.length() > FBUtilities.MAX_UNSIGNED_SHORT
? warning.substring(0, FBUtilities.MAX_UNSIGNED_SHORT - TRUNCATED.length()) + TRUNCATED
: warning;
}
}
}