| /* |
| * 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 io.netty.util.concurrent.FastThreadLocal; |
| import org.apache.cassandra.concurrent.ExecutorLocal; |
| import org.apache.cassandra.utils.FBUtilities; |
| |
| public class ClientWarn implements ExecutorLocal<ClientWarn.State> |
| { |
| private static final String TRUNCATED = " [truncated]"; |
| private static final FastThreadLocal<State> warnLocal = new FastThreadLocal<>(); |
| 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<String> 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<String> 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; |
| } |
| |
| } |
| } |