[ https://issues.apache.org/jira/browse/HADOOP-17126?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ahmed Hussein updated HADOOP-17126:
-----------------------------------
Attachment: HADOOP-17126.002.patch
> implement non-guava Precondition checkNotNull
> ---------------------------------------------
>
> Key: HADOOP-17126
> URL: https://issues.apache.org/jira/browse/HADOOP-17126
> Project: Hadoop Common
> Issue Type: Sub-task
> Reporter: Ahmed Hussein
> Assignee: Ahmed Hussein
> Priority: Major
> Attachments: HADOOP-17126.001.patch, HADOOP-17126.002.patch
>
>
> As part In order to replace Guava Preconditions, we need to implement our own versions
of the API.
> This Jira is to create {{checkNotNull}} in a new package dubbed {{unguava}}.
> +The plan is as follows+
> * create a new {{package org.apache.hadoop.util.unguava;}}
> * {{create class Validate}}
> * implement {{package org.apache.hadoop.util.unguava.Validate;}} with the following
interface
> ** {{checkNotNull(final T obj)}}
> ** {{checkNotNull(final T reference, final Object errorMessage)}}
> ** {{checkNotNull(final T obj, final String message, final Object... values)}}
> ** {{checkNotNull(final T obj,final Supplier<String> msgSupplier)}}
> * {{guava.preconditions used String.lenientformat which suppressed exceptions caused
by string formatting of the exception message . So, in order to avoid changing the behavior,
the implementation catches Exceptions triggered by building the message (IllegalFormat, InsufficientArg,
NullPointer..etc)}}
> * {{After merging the new class, we can replace guava.Preconditions.checkNotNull by {{unguava.Validate.checkNotNull}}}}
> * We need the change to go into trunk, 3.1, 3.2, and 3.3
>
> Similar Jiras will be created to implement checkState, checkArgument, checkIndex
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