Throwables.java

/*
 * Copyright 2014 Netflix, 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.netflix.servo.util;

/**
 * Utility class to deal with exceptions. Intended for internal use of servo only.
 */
public final class Throwables {
  private Throwables() {
  }

  /**
   * Propagates {@code throwable} as-is if it is an instance of
   * {@link RuntimeException} or {@link Error}, or else as a last resort, wraps
   * it in a {@code RuntimeException} then propagates.
   */
  public static RuntimeException propagate(Throwable throwable) {
    final Throwable t = Preconditions.checkNotNull(throwable, "throwable");
    if (t instanceof Error) {
      throw (Error) t;
    }
    if (t instanceof RuntimeException) {
      throw (RuntimeException) t;
    }

    throw new RuntimeException(t);
  }
}