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| <h2 title="Class IgfsUserContext" class="title">Class IgfsUserContext</h2>
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| <pre>public abstract class <span class="strong">IgfsUserContext</span>
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| extends <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
|
| <div class="block">Provides ability to execute IGFS code in a context of a specific user.</div>
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| <td class="colOne"><code><strong><a href="../../../../org/apache/ignite/igfs/IgfsUserContext.html#IgfsUserContext()">IgfsUserContext</a></strong>()</code> </td>
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| <td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
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| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/igfs/IgfsUserContext.html#currentUser()">currentUser</a></strong>()</code>
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| <div class="block">Gets the current context user.</div>
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| <td class="colFirst"><code>static <span class='angle_bracket'><</span>T<span class='angle_bracket'>></span> T</code></td>
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| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/igfs/IgfsUserContext.html#doAs(java.lang.String,%20java.util.concurrent.Callable)">doAs</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> user,
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| <a href="http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/Callable.html?is-external=true" title="class or interface in java.util.concurrent">Callable</a><span class='angle_bracket'><</span>T<span class='angle_bracket'>></span> clbl)</code>
|
| <div class="block">Same contract that <a href="../../../../org/apache/ignite/igfs/IgfsUserContext.html#doAs(java.lang.String,%20org.apache.ignite.lang.IgniteOutClosure)"><code>doAs(String, IgniteOutClosure)</code></a> has, but accepts |
| callable that throws checked Exception.</div>
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| </td>
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| <td class="colFirst"><code>static <span class='angle_bracket'><</span>T<span class='angle_bracket'>></span> T</code></td>
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| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/igfs/IgfsUserContext.html#doAs(java.lang.String,%20org.apache.ignite.lang.IgniteOutClosure)">doAs</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> user,
|
| <a href="../../../../org/apache/ignite/lang/IgniteOutClosure.html" title="interface in org.apache.ignite.lang">IgniteOutClosure</a><span class='angle_bracket'><</span>T<span class='angle_bracket'>></span> clo)</code>
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| <div class="block">Executes given callable in the given user context.</div>
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| <pre>public IgfsUserContext()</pre>
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| <h4>doAs</h4>
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| <pre>public static <span class='angle_bracket'><</span>T<span class='angle_bracket'>></span> T doAs(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> user,
|
| <a href="../../../../org/apache/ignite/lang/IgniteOutClosure.html" title="interface in org.apache.ignite.lang">IgniteOutClosure</a><span class='angle_bracket'><</span>T<span class='angle_bracket'>></span> clo)</pre>
|
| <div class="block">Executes given callable in the given user context. |
| The main contract of this method is that <a href="../../../../org/apache/ignite/igfs/IgfsUserContext.html#currentUser()"><code>currentUser()</code></a> method invoked |
| inside closure always returns 'user' this callable executed with.</div>
|
| <dl><dt><span class="strong">Type Parameters:</span></dt><dd><code>T</code> - The type of closure result.</dd><dt><span class="strong">Parameters:</span></dt><dd><code>user</code> - the user name to invoke closure on behalf of.</dd><dd><code>clo</code> - the closure to execute</dd>
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| <dt><span class="strong">Returns:</span></dt><dd>the result of closure execution.</dd>
|
| <dt><span class="strong">Throws:</span></dt>
|
| <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if user name is null or empty String or if the closure is null.</dd></dl>
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| <pre>public static <span class='angle_bracket'><</span>T<span class='angle_bracket'>></span> T doAs(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> user,
|
| <a href="http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/Callable.html?is-external=true" title="class or interface in java.util.concurrent">Callable</a><span class='angle_bracket'><</span>T<span class='angle_bracket'>></span> clbl)
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| throws <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
|
| <div class="block">Same contract that <a href="../../../../org/apache/ignite/igfs/IgfsUserContext.html#doAs(java.lang.String,%20org.apache.ignite.lang.IgniteOutClosure)"><code>doAs(String, IgniteOutClosure)</code></a> has, but accepts |
| callable that throws checked Exception. |
| The Exception is not ever wrapped anyhow. |
| If your Callable throws Some specific checked Exceptions, the recommended usage pattern is: |
| <pre name="code" class="java"> |
| public Foo myOperation() throws MyCheckedException1, MyCheckedException2 { |
| try { |
| return IgfsUserContext.doAs(user, new Callable<Foo>() { |
| @Override public Foo call() throws MyCheckedException1, MyCheckedException2 { |
| return makeSomeFoo(); // do the job |
| } |
| }); |
| } |
| catch (MyCheckedException1 | MyCheckedException2 | RuntimeException | Error e) { |
| throw e; |
| } |
| catch (Exception e) { |
| throw new AssertionError("Must never go there."); |
| } |
| } |
| </pre></div>
|
| <dl><dt><span class="strong">Type Parameters:</span></dt><dd><code>T</code> - The type of callable result.</dd><dt><span class="strong">Parameters:</span></dt><dd><code>user</code> - the user name to invoke closure on behalf of.</dd><dd><code>clbl</code> - the Callable to execute</dd>
|
| <dt><span class="strong">Returns:</span></dt><dd>the result of closure execution.</dd>
|
| <dt><span class="strong">Throws:</span></dt>
|
| <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if user name is null or empty String or if the closure is null.</dd>
|
| <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd></dl>
|
| </li>
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| <h4>currentUser</h4>
|
| <pre>@Nullable
|
| public static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> currentUser()</pre>
|
| <div class="block">Gets the current context user. |
| If this method is invoked outside of any <a href="../../../../org/apache/ignite/igfs/IgfsUserContext.html#doAs(java.lang.String,%20org.apache.ignite.lang.IgniteOutClosure)"><code>doAs(String, IgniteOutClosure)</code></a> on the call stack, it will |
| return null. Otherwise it will return the user name set in the most lower |
| <a href="../../../../org/apache/ignite/igfs/IgfsUserContext.html#doAs(java.lang.String,%20org.apache.ignite.lang.IgniteOutClosure)"><code>doAs(String, IgniteOutClosure)</code></a> call on the call stack.</div>
|
| <dl><dt><span class="strong">Returns:</span></dt><dd>The current user, may be null.</dd></dl>
|
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