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| <h2 title="Class AsyncRegionLocationCache" class="title">Class AsyncRegionLocationCache</h2> |
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| <li>org.apache.hadoop.hbase.client.AsyncRegionLocationCache</li> |
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| <pre>final class <a href="../../../../../src-html/org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#line.45">AsyncRegionLocationCache</a> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">Cache of RegionLocations for use by <a href="../../../../../org/apache/hadoop/hbase/client/AsyncNonMetaRegionLocator.html" title="class in org.apache.hadoop.hbase.client"><code>AsyncNonMetaRegionLocator</code></a>. Wrapper around |
| ConcurrentSkipListMap ensuring proper access to cached items. Updates are synchronized, but reads |
| are not.</div> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentNavigableMap.html?is-external=true" title="class or interface in java.util.concurrent">ConcurrentNavigableMap</a><byte[],<a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#cache">cache</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#LOG">LOG</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#tableName">tableName</a></span></code> </td> |
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| <th class="colOne" scope="col">Constructor and Description</th> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#AsyncRegionLocationCache-org.apache.hadoop.hbase.TableName-">AsyncRegionLocationCache</a></span>(<a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> tableName)</code> </td> |
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| <tr> |
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| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#add-org.apache.hadoop.hbase.RegionLocations-">add</a></span>(<a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a> locs)</code> |
| <div class="block">Add the given locations to the cache, merging with existing if necessary.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>private void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#cleanProblematicOverlappedRegions-org.apache.hadoop.hbase.RegionLocations-">cleanProblematicOverlappedRegions</a></span>(<a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a> locations)</code> |
| <div class="block">When caching a location, the region may have been the result of a merge.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#findForBeforeRow-byte:A-int-">findForBeforeRow</a></span>(byte[] row, |
| int replicaId)</code> |
| <div class="block">Finds the RegionLocations for the region with the greatest startKey strictly less than the |
| given row</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#findForRow-byte:A-int-">findForRow</a></span>(byte[] row, |
| int replicaId)</code> |
| <div class="block">Finds the RegionLocations for the region with the greatest startKey less than or equal to the |
| given row</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#get-byte:A-">get</a></span>(byte[] startKey)</code> |
| <div class="block">Gets the RegionLocations for a given region's startKey.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><<a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#getAll--">getAll</a></span>()</code> |
| <div class="block">Returns all cached RegionLocations</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>private boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#isEqual-org.apache.hadoop.hbase.RegionLocations-org.apache.hadoop.hbase.RegionLocations-">isEqual</a></span>(<a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a> locs1, |
| <a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a> locs2)</code> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#remove-org.apache.hadoop.hbase.HRegionLocation-">remove</a></span>(<a href="../../../../../org/apache/hadoop/hbase/HRegionLocation.html" title="class in org.apache.hadoop.hbase">HRegionLocation</a> loc)</code> |
| <div class="block">Removes the location from the cache if it exists and can be removed.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#removeForServer-org.apache.hadoop.hbase.ServerName-">removeForServer</a></span>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> serverName)</code> |
| <div class="block">Removes serverName from all locations in the cache, fully removing any RegionLocations which |
| are empty after removing the server from it.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#size--">size</a></span>()</code> |
| <div class="block">Returns the size of the region locations cache</div> |
| </td> |
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| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
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| <h4>LOG</h4> |
| <pre>private static final org.slf4j.Logger <a href="../../../../../src-html/org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#line.47">LOG</a></pre> |
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| <h4>cache</h4> |
| <pre>private final <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentNavigableMap.html?is-external=true" title="class or interface in java.util.concurrent">ConcurrentNavigableMap</a><byte[],<a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a>> <a href="../../../../../src-html/org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#line.49">cache</a></pre> |
| </li> |
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| <a name="tableName"> |
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| <h4>tableName</h4> |
| <pre>private final <a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#line.51">tableName</a></pre> |
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| <h3>Constructor Detail</h3> |
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| <h4>AsyncRegionLocationCache</h4> |
| <pre>public <a href="../../../../../src-html/org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#line.53">AsyncRegionLocationCache</a>(<a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> tableName)</pre> |
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| <a name="add-org.apache.hadoop.hbase.RegionLocations-"> |
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| <h4>add</h4> |
| <pre>public <a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#line.64">add</a>(<a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a> locs)</pre> |
| <div class="block">Add the given locations to the cache, merging with existing if necessary. Also cleans out any |
| previously cached locations which may have been superseded by this one (i.e. in case of merged |
| regions). See <a href="../../../../../org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#cleanProblematicOverlappedRegions-org.apache.hadoop.hbase.RegionLocations-"><code>cleanProblematicOverlappedRegions(RegionLocations)</code></a></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>locs</code> - the locations to cache</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the final location (possibly merged) that was added to the cache</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>cleanProblematicOverlappedRegions</h4> |
| <pre>private void <a href="../../../../../src-html/org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#line.120">cleanProblematicOverlappedRegions</a>(<a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a> locations)</pre> |
| <div class="block">When caching a location, the region may have been the result of a merge. Check to see if the |
| region's boundaries overlap any other cached locations in a problematic way. Those would have |
| been merge parents which no longer exist. We need to proactively clear them out to avoid a case |
| where a merged region which receives no requests never gets cleared. This causes requests to |
| other merged regions after it to see the wrong cached location. |
| <p> |
| For example, if we have Start_New < Start_Old < End_Old < End_New, then if we only access |
| within range [End_Old, End_New], then it will always return the old region but it will then |
| find out the row is not in the range, and try to get the new region, and then we get |
| [Start_New, End_New), still fall into the same situation. |
| <p> |
| If Start_Old is less than Start_New, even if we have overlap, it is not a problem, as when the |
| row is greater than Start_New, we will locate to the new region, and if the row is less than |
| Start_New, it will fall into the old region's range and we will try to access the region and |
| get a NotServing exception, and then we will clean the cache. |
| <p> |
| See HBASE-27650</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>locations</code> - the new location that was just cached</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isEqual-org.apache.hadoop.hbase.RegionLocations-org.apache.hadoop.hbase.RegionLocations-"> |
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| <h4>isEqual</h4> |
| <pre>private boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#line.148">isEqual</a>(<a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a> locs1, |
| <a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a> locs2)</pre> |
| </li> |
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| <h4>getAll</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><<a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a>> <a href="../../../../../src-html/org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#line.180">getAll</a>()</pre> |
| <div class="block">Returns all cached RegionLocations</div> |
| </li> |
| </ul> |
| <a name="get-byte:A-"> |
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| </a> |
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| <li class="blockList"> |
| <h4>get</h4> |
| <pre>public <a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#line.189">get</a>(byte[] startKey)</pre> |
| <div class="block">Gets the RegionLocations for a given region's startKey. This is a direct lookup, if the key |
| does not exist in the cache it will return null.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>startKey</code> - region start key to directly look up</dd> |
| </dl> |
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| </ul> |
| <a name="findForRow-byte:A-int-"> |
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| <h4>findForRow</h4> |
| <pre>public <a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#line.198">findForRow</a>(byte[] row, |
| int replicaId)</pre> |
| <div class="block">Finds the RegionLocations for the region with the greatest startKey less than or equal to the |
| given row</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>row</code> - row to find locations</dd> |
| </dl> |
| </li> |
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| <h4>findForBeforeRow</h4> |
| <pre>public <a href="../../../../../org/apache/hadoop/hbase/RegionLocations.html" title="class in org.apache.hadoop.hbase">RegionLocations</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#line.232">findForBeforeRow</a>(byte[] row, |
| int replicaId)</pre> |
| <div class="block">Finds the RegionLocations for the region with the greatest startKey strictly less than the |
| given row</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>row</code> - row to find locations</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="remove-org.apache.hadoop.hbase.HRegionLocation-"> |
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| <h4>remove</h4> |
| <pre>public boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#line.265">remove</a>(<a href="../../../../../org/apache/hadoop/hbase/HRegionLocation.html" title="class in org.apache.hadoop.hbase">HRegionLocation</a> loc)</pre> |
| <div class="block">Removes the location from the cache if it exists and can be removed.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if entry was removed</dd> |
| </dl> |
| </li> |
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| <h4>size</h4> |
| <pre>public int <a href="../../../../../src-html/org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#line.292">size</a>()</pre> |
| <div class="block">Returns the size of the region locations cache</div> |
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| <h4>removeForServer</h4> |
| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/client/AsyncRegionLocationCache.html#line.301">removeForServer</a>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> serverName)</pre> |
| <div class="block">Removes serverName from all locations in the cache, fully removing any RegionLocations which |
| are empty after removing the server from it.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>serverName</code> - server to remove from locations</dd> |
| </dl> |
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