cassandra-server

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  <html lang="en"> <head>  <title>FBUtilities (apache-cassandra API)</title> <meta name="date" content="2014-09-07"> <link rel="stylesheet" type="text/css" href="../../../../stylesheet.css" title="Style"> </head> <body> <script type="text/javascript"> </script> <noscript> <div>JavaScript is disabled on your browser.</div> </noscript>  <div class="topNav"><a name="navbar_top">  </a><a href="#skip-navbar_top" title="Skip navigation links"></a><a name="navbar_top_firstrow">  </a> <ul class="navList" title="Navigation"> <li><a href="../../../../overview-summary.html">Overview</a></li> <li><a href="package-summary.html">Package</a></li> <li class="navBarCell1Rev">Class</li> <li><a href="class-use/FBUtilities.html">Use</a></li> <li><a href="package-tree.html">Tree</a></li> <li><a href="../../../../deprecated-list.html">Deprecated</a></li> <li><a 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href="#field_summary">Field</a> | </li> <li><a href="#constructor_summary">Constr</a> | </li> <li><a href="#method_summary">Method</a></li> </ul> <ul class="subNavList"> <li>Detail: </li> <li><a href="#field_detail">Field</a> | </li> <li><a href="#constructor_detail">Constr</a> | </li> <li><a href="#method_detail">Method</a></li> </ul> </div> <a name="skip-navbar_top">  </a></div>   <div class="header"> <div class="subTitle">org.apache.cassandra.utils</div> <h2 title="Class FBUtilities" class="title">Class FBUtilities</h2> </div> <div class="contentContainer"> <ul class="inheritance"> <li>java.lang.Object</li> <li> <ul class="inheritance"> <li>org.apache.cassandra.utils.FBUtilities</li> </ul> </li> </ul> <div class="description"> <ul class="blockList"> <li class="blockList"> <hr> <br> <pre>public class <span class="strong">FBUtilities</span> extends java.lang.Object</pre> </li> </ul> </div> <div class="summary"> <ul class="blockList"> <li class="blockList">  <ul class="blockList"> <li class="blockList"><a name="field_summary">  </a> <h3>Field Summary</h3> <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation"> <caption><span>Fields</span><span class="tabEnd"> </span></caption> <tr> <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>static int</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#MAX_UNSIGNED_SHORT">MAX_UNSIGNED_SHORT</a></strong></code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static java.math.BigInteger</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#TWO">TWO</a></strong></code> </td> </tr> </table> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="constructor_summary">  </a> <h3>Constructor Summary</h3> <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation"> <caption><span>Constructors</span><span class="tabEnd"> </span></caption> <tr> <th class="colOne" scope="col">Constructor and Description</th> </tr> <tr class="altColor"> <td class="colOne"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#FBUtilities()">FBUtilities</a></strong>()</code> </td> </tr> </table> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="method_summary">  </a> <h3>Method Summary</h3> <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> <caption><span>Methods</span><span class="tabEnd"> </span></caption> <tr> <th class="colFirst" scope="col">Modifier and Type</th> <th class="colLast" scope="col">Method and Description</th> </tr> <tr class="altColor"> <td class="colFirst"><code>static long</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#abs(long)">abs</a></strong>(long index)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static java.io.File</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#cassandraTriggerDir()">cassandraTriggerDir</a></strong>()</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static <T> java.lang.Class<T></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#classForName(java.lang.String,%20java.lang.String)">classForName</a></strong>(java.lang.String classname, java.lang.String readable)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static <T> <a href="../../../../org/apache/cassandra/utils/CloseableIterator.html" title="interface in org.apache.cassandra.utils">CloseableIterator</a><T></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#closeableIterator(java.util.Iterator)">closeableIterator</a></strong>(java.util.Iterator<T> iterator)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static int</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#compareUnsigned(byte[],%20byte[])">compareUnsigned</a></strong>(byte[] bytes1, byte[] bytes2)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static int</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#compareUnsigned(byte[],%20byte[],%20int,%20int,%20int,%20int)">compareUnsigned</a></strong>(byte[] bytes1, byte[] bytes2, int offset1, int offset2, int len1, int len2)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static <T> T</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#construct(java.lang.String,%20java.lang.String)">construct</a></strong>(java.lang.String classname, java.lang.String readable)</code> <div class="block">Constructs an instance of the given class, which must have a no-arg or default constructor.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static long</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#copy(java.io.InputStream,%20java.io.OutputStream,%20long)">copy</a></strong>(java.io.InputStream from, java.io.OutputStream to, long limit)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#deserialize(org.apache.thrift.TDeserializer,%20org.apache.thrift.TBase,%20java.io.DataInput)">deserialize</a></strong>(org.apache.thrift.TDeserializer deserializer, org.apache.thrift.TBase struct, java.io.DataInput in)</code> <div class="block"><strong>Deprecated.</strong> </div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#exec(java.lang.ProcessBuilder)">exec</a></strong>(java.lang.ProcessBuilder pb)</code> <div class="block">Starts and waits for the given @param pb to finish.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static java.util.List<java.lang.String></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#fromJsonList(java.lang.String)">fromJsonList</a></strong>(java.lang.String json)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static java.util.Map<java.lang.String,java.lang.String></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#fromJsonMap(java.lang.String)">fromJsonMap</a></strong>(java.lang.String json)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static java.util.Collection<java.net.InetAddress></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#getAllLocalAddresses()">getAllLocalAddresses</a></strong>()</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static int</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#getAvailableProcessors()">getAvailableProcessors</a></strong>()</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static java.net.InetAddress</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#getBroadcastAddress()">getBroadcastAddress</a></strong>()</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static java.net.InetAddress</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#getLocalAddress()">getLocalAddress</a></strong>()</code> <div class="block">Please use getBroadcastAddress instead.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static java.lang.reflect.Field</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#getProtectedField(java.lang.Class,%20java.lang.String)">getProtectedField</a></strong>(java.lang.Class klass, java.lang.String fieldName)</code> <div class="block">Used to get access to protected/private field of the specified class</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static java.lang.String</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#getReleaseVersionString()">getReleaseVersionString</a></strong>()</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static java.io.File</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#getToolsOutputDirectory()">getToolsOutputDirectory</a></strong>()</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static byte[]</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#hash(java.nio.ByteBuffer...)">hash</a></strong>(java.nio.ByteBuffer... data)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static java.math.BigInteger</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#hashToBigInteger(java.nio.ByteBuffer)">hashToBigInteger</a></strong>(java.nio.ByteBuffer data)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static boolean</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#isUnix()">isUnix</a></strong>()</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static java.lang.String</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#json(java.lang.Object)">json</a></strong>(java.lang.Object object)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static <a href="../../../../org/apache/cassandra/utils/Pair.html" title="class in org.apache.cassandra.utils">Pair</a><java.math.BigInteger,java.lang.Boolean></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#midpoint(java.math.BigInteger,%20java.math.BigInteger,%20int)">midpoint</a></strong>(java.math.BigInteger left, java.math.BigInteger right, int sigbits)</code> <div class="block">Given two bit arrays represented as BigIntegers, containing the given number of significant bits, calculate a midpoint.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static <a href="../../../../org/apache/cassandra/auth/IAuthenticator.html" title="interface in org.apache.cassandra.auth">IAuthenticator</a></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#newAuthenticator(java.lang.String)">newAuthenticator</a></strong>(java.lang.String className)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static <a href="../../../../org/apache/cassandra/auth/IAuthorizer.html" title="interface in org.apache.cassandra.auth">IAuthorizer</a></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#newAuthorizer(java.lang.String)">newAuthorizer</a></strong>(java.lang.String className)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static java.security.MessageDigest</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#newMessageDigest(java.lang.String)">newMessageDigest</a></strong>(java.lang.String algorithm)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static <a href="../../../../org/apache/cassandra/io/util/IAllocator.html" title="interface in org.apache.cassandra.io.util">IAllocator</a></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#newOffHeapAllocator(java.lang.String)">newOffHeapAllocator</a></strong>(java.lang.String offheap_allocator)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static <a href="../../../../org/apache/cassandra/dht/IPartitioner.html" title="interface in org.apache.cassandra.dht">IPartitioner</a></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#newPartitioner(java.lang.String)">newPartitioner</a></strong>(java.lang.String partitionerClassName)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static java.lang.String</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#resourceToFile(java.lang.String)">resourceToFile</a></strong>(java.lang.String filename)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static <T> byte[]</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#serialize(T,%20org.apache.cassandra.io.IVersionedSerializer,%20int)">serialize</a></strong>(T object, <a href="../../../../org/apache/cassandra/io/IVersionedSerializer.html" title="interface in org.apache.cassandra.io">IVersionedSerializer</a><T> serializer, int version)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#serialize(org.apache.thrift.TSerializer,%20org.apache.thrift.TBase,%20java.io.DataOutput)">serialize</a></strong>(org.apache.thrift.TSerializer serializer, org.apache.thrift.TBase struct, java.io.DataOutput out)</code> <div class="block"><strong>Deprecated.</strong> </div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static <T> java.util.SortedSet<T></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#singleton(T,%20java.util.Comparator)">singleton</a></strong>(T column, java.util.Comparator<? super T> comparator)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#sortSampledKeys(java.util.List,%20org.apache.cassandra.dht.Range)">sortSampledKeys</a></strong>(java.util.List<<a href="../../../../org/apache/cassandra/db/DecoratedKey.html" title="class in org.apache.cassandra.db">DecoratedKey</a>> keys, <a href="../../../../org/apache/cassandra/dht/Range.html" title="class in org.apache.cassandra.dht">Range</a><<a href="../../../../org/apache/cassandra/dht/Token.html" title="class in org.apache.cassandra.dht">Token</a>> range)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static java.security.MessageDigest</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#threadLocalMD5Digest()">threadLocalMD5Digest</a></strong>()</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static java.util.Random</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#threadLocalRandom()">threadLocalRandom</a></strong>()</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static long</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#timestampMicros()">timestampMicros</a></strong>()</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static java.lang.String</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#toString(java.util.Map)">toString</a></strong>(java.util.Map<?,?> map)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#updateChecksumInt(java.util.zip.Checksum,%20int)">updateChecksumInt</a></strong>(java.util.zip.Checksum checksum, int v)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#updateWithByte(java.security.MessageDigest,%20int)">updateWithByte</a></strong>(java.security.MessageDigest digest, int val)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#updateWithInt(java.security.MessageDigest,%20int)">updateWithInt</a></strong>(java.security.MessageDigest digest, int val)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#updateWithLong(java.security.MessageDigest,%20long)">updateWithLong</a></strong>(java.security.MessageDigest digest, long val)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#updateWithShort(java.security.MessageDigest,%20int)">updateWithShort</a></strong>(java.security.MessageDigest digest, int val)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static <T> T</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#waitOnFuture(java.util.concurrent.Future)">waitOnFuture</a></strong>(java.util.concurrent.Future<T> future)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#waitOnFutures(java.lang.Iterable)">waitOnFutures</a></strong>(java.lang.Iterable<java.util.concurrent.Future<?>> futures)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#waitOnFutures(java.util.List,%20long)">waitOnFutures</a></strong>(java.util.List<<a href="../../../../org/apache/cassandra/net/AsyncOneResponse.html" title="class in org.apache.cassandra.net">AsyncOneResponse</a>> results, long ms)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static byte[]</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/FBUtilities.html#xor(byte[],%20byte[])">xor</a></strong>(byte[] left, byte[] right)</code> </td> </tr> </table> <ul class="blockList"> <li class="blockList"><a name="methods_inherited_from_class_java.lang.Object">  </a> <h3>Methods inherited from class java.lang.Object</h3> <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li> </ul> </li> </ul> </li> </ul> </div> <div class="details"> <ul class="blockList"> <li class="blockList">  <ul class="blockList"> <li class="blockList"><a name="field_detail">  </a> <h3>Field Detail</h3> <a name="TWO">  </a> <ul class="blockList"> <li class="blockList"> <h4>TWO</h4> <pre>public static final java.math.BigInteger TWO</pre> </li> </ul> <a name="MAX_UNSIGNED_SHORT">  </a> <ul class="blockListLast"> <li class="blockList"> <h4>MAX_UNSIGNED_SHORT</h4> <pre>public static final int MAX_UNSIGNED_SHORT</pre> <dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../constant-values.html#org.apache.cassandra.utils.FBUtilities.MAX_UNSIGNED_SHORT">Constant Field Values</a></dd></dl> </li> </ul> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="constructor_detail">  </a> <h3>Constructor Detail</h3> <a name="FBUtilities()">  </a> <ul class="blockListLast"> <li class="blockList"> <h4>FBUtilities</h4> <pre>public FBUtilities()</pre> </li> </ul> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="method_detail">  </a> <h3>Method Detail</h3> <a name="getAvailableProcessors()">  </a> <ul class="blockList"> <li class="blockList"> <h4>getAvailableProcessors</h4> <pre>public static int getAvailableProcessors()</pre> </li> </ul> <a name="threadLocalMD5Digest()">  </a> <ul class="blockList"> <li class="blockList"> <h4>threadLocalMD5Digest</h4> <pre>public static java.security.MessageDigest threadLocalMD5Digest()</pre> </li> </ul> <a name="newMessageDigest(java.lang.String)">  </a> <ul class="blockList"> <li class="blockList"> <h4>newMessageDigest</h4> <pre>public static java.security.MessageDigest newMessageDigest(java.lang.String algorithm)</pre> </li> </ul> <a name="threadLocalRandom()">  </a> <ul class="blockList"> <li class="blockList"> <h4>threadLocalRandom</h4> <pre>public static java.util.Random threadLocalRandom()</pre> </li> </ul> <a name="getLocalAddress()">  </a> <ul class="blockList"> <li class="blockList"> <h4>getLocalAddress</h4> <pre>public static java.net.InetAddress getLocalAddress()</pre> <div class="block">Please use getBroadcastAddress instead. 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