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From ahgittin <...@git.apache.org>
Subject [GitHub] incubator-brooklyn pull request: Deploy across an entire web clust...
Date Tue, 29 Jul 2014 15:41:39 GMT
Github user ahgittin commented on a diff in the pull request:

    https://github.com/apache/incubator-brooklyn/pull/83#discussion_r15531357
  
    --- Diff: utils/common/src/main/java/brooklyn/util/exceptions/ReferenceWithError.java
---
    @@ -0,0 +1,86 @@
    +/*
    + * 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 brooklyn.util.exceptions;
    +
    +import javax.annotation.Nullable;
    +
    +import com.google.common.base.Supplier;
    +
    +/** A reference to an object which can carry an object alongside it. */
    +public class ReferenceWithError<T> implements Supplier<T> {
    +
    +    private final T object;
    +    private final Throwable error;
    +    private final boolean throwErrorOnAccess;
    +
    +    /** returns a reference which includes an error, and where attempts to get the content
cause the error to throw */
    +    public static <T> ReferenceWithError<T> newInstanceWithFatalError(T object,
Throwable error) {
    +        return new ReferenceWithError<T>(object, error, true);
    +    }
    +    
    +    /** returns a reference which includes an error, but attempts to get the content
do not cause the error to throw */
    +    public static <T> ReferenceWithError<T> newInstanceWithInformativeError(T
object, Throwable error) {
    --- End diff --
    
    and various other changes in the same vein to clarify API


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