Repository: hbase-site Updated Branches: refs/heads/asf-site 539ad1779 -> ecb8d8ba0
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/ecb8d8ba/0.94/xref/org/apache/hadoop/hbase/io/encoding/PrefixKeyDeltaEncoder.html ---------------------------------------------------------------------- diff --git a/0.94/xref/org/apache/hadoop/hbase/io/encoding/PrefixKeyDeltaEncoder.html b/0.94/xref/org/apache/hadoop/hbase/io/encoding/PrefixKeyDeltaEncoder.html index 0007f84..fb4d583 100644 --- a/0.94/xref/org/apache/hadoop/hbase/io/encoding/PrefixKeyDeltaEncoder.html +++ b/0.94/xref/org/apache/hadoop/hbase/io/encoding/PrefixKeyDeltaEncoder.html @@ -36,174 +36,177 @@ <a class="jxr_linenumber" name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.util.Bytes; <a class="jxr_linenumber" name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.io.RawComparator; <a class="jxr_linenumber" name="28" href="#28">28</a> -<a class="jxr_linenumber" name="29" href="#29">29</a> <em class="jxr_javadoccomment">/**</em> -<a class="jxr_linenumber" name="30" href="#30">30</a> <em class="jxr_javadoccomment"> * Compress key by storing size of common prefix with previous KeyValue</em> -<a class="jxr_linenumber" name="31" href="#31">31</a> <em class="jxr_javadoccomment"> * and storing raw size of rest.</em> -<a class="jxr_linenumber" name="32" href="#32">32</a> <em class="jxr_javadoccomment"> *</em> -<a class="jxr_linenumber" name="33" href="#33">33</a> <em class="jxr_javadoccomment"> * Format:</em> -<a class="jxr_linenumber" name="34" href="#34">34</a> <em class="jxr_javadoccomment"> * 1-5 bytes: compressed key length minus prefix (7-bit encoding)</em> -<a class="jxr_linenumber" name="35" href="#35">35</a> <em class="jxr_javadoccomment"> * 1-5 bytes: compressed value length (7-bit encoding)</em> -<a class="jxr_linenumber" name="36" href="#36">36</a> <em class="jxr_javadoccomment"> * 1-3 bytes: compressed length of common key prefix</em> -<a class="jxr_linenumber" name="37" href="#37">37</a> <em class="jxr_javadoccomment"> * ... bytes: rest of key (including timestamp)</em> -<a class="jxr_linenumber" name="38" href="#38">38</a> <em class="jxr_javadoccomment"> * ... bytes: value</em> -<a class="jxr_linenumber" name="39" href="#39">39</a> <em class="jxr_javadoccomment"> *</em> -<a class="jxr_linenumber" name="40" href="#40">40</a> <em class="jxr_javadoccomment"> * In a worst case compressed KeyValue will be three bytes longer than original.</em> +<a class="jxr_linenumber" name="29" href="#29">29</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.classification.InterfaceAudience; +<a class="jxr_linenumber" name="30" href="#30">30</a> +<a class="jxr_linenumber" name="31" href="#31">31</a> <em class="jxr_javadoccomment">/**</em> +<a class="jxr_linenumber" name="32" href="#32">32</a> <em class="jxr_javadoccomment"> * Compress key by storing size of common prefix with previous KeyValue</em> +<a class="jxr_linenumber" name="33" href="#33">33</a> <em class="jxr_javadoccomment"> * and storing raw size of rest.</em> +<a class="jxr_linenumber" name="34" href="#34">34</a> <em class="jxr_javadoccomment"> *</em> +<a class="jxr_linenumber" name="35" href="#35">35</a> <em class="jxr_javadoccomment"> * Format:</em> +<a class="jxr_linenumber" name="36" href="#36">36</a> <em class="jxr_javadoccomment"> * 1-5 bytes: compressed key length minus prefix (7-bit encoding)</em> +<a class="jxr_linenumber" name="37" href="#37">37</a> <em class="jxr_javadoccomment"> * 1-5 bytes: compressed value length (7-bit encoding)</em> +<a class="jxr_linenumber" name="38" href="#38">38</a> <em class="jxr_javadoccomment"> * 1-3 bytes: compressed length of common key prefix</em> +<a class="jxr_linenumber" name="39" href="#39">39</a> <em class="jxr_javadoccomment"> * ... bytes: rest of key (including timestamp)</em> +<a class="jxr_linenumber" name="40" href="#40">40</a> <em class="jxr_javadoccomment"> * ... bytes: value</em> <a class="jxr_linenumber" name="41" href="#41">41</a> <em class="jxr_javadoccomment"> *</em> -<a class="jxr_linenumber" name="42" href="#42">42</a> <em class="jxr_javadoccomment"> */</em> -<a class="jxr_linenumber" name="43" href="#43">43</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/apache/hadoop/hbase/io/encoding/PrefixKeyDeltaEncoder.html">PrefixKeyDeltaEncoder</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../../../org/apache/hadoop/hbase/io/encoding/BufferedDataBlockEncoder.html">BufferedDataBlockEncoder</a> { -<a class="jxr_linenumber" name="44" href="#44">44</a> -<a class="jxr_linenumber" name="45" href="#45">45</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> addKV(<strong class="jxr_keyword">int</strong> prevKeyOffset, DataOutputStream out, -<a class="jxr_linenumber" name="46" href="#46">46</a> ByteBuffer in, <strong class="jxr_keyword">int</strong> prevKeyLength) <strong class="jxr_keyword">throws</strong> IOException { -<a class="jxr_linenumber" name="47" href="#47">47</a> <strong class="jxr_keyword">int</strong> keyLength = in.getInt(); -<a class="jxr_linenumber" name="48" href="#48">48</a> <strong class="jxr_keyword">int</strong> valueLength = in.getInt(); -<a class="jxr_linenumber" name="49" href="#49">49</a> -<a class="jxr_linenumber" name="50" href="#50">50</a> <strong class="jxr_keyword">if</strong> (prevKeyOffset == -1) { -<a class="jxr_linenumber" name="51" href="#51">51</a> <em class="jxr_comment">// copy the key, there is no common prefix with none</em> -<a class="jxr_linenumber" name="52" href="#52">52</a> ByteBufferUtils.putCompressedInt(out, keyLength); -<a class="jxr_linenumber" name="53" href="#53">53</a> ByteBufferUtils.putCompressedInt(out, valueLength); -<a class="jxr_linenumber" name="54" href="#54">54</a> ByteBufferUtils.putCompressedInt(out, 0); -<a class="jxr_linenumber" name="55" href="#55">55</a> ByteBufferUtils.moveBufferToStream(out, in, keyLength + valueLength); -<a class="jxr_linenumber" name="56" href="#56">56</a> } <strong class="jxr_keyword">else</strong> { -<a class="jxr_linenumber" name="57" href="#57">57</a> <em class="jxr_comment">// find a common prefix and skip it</em> -<a class="jxr_linenumber" name="58" href="#58">58</a> <strong class="jxr_keyword">int</strong> common = ByteBufferUtils.findCommonPrefix( -<a class="jxr_linenumber" name="59" href="#59">59</a> in, prevKeyOffset + KeyValue.ROW_OFFSET, -<a class="jxr_linenumber" name="60" href="#60">60</a> in.position(), -<a class="jxr_linenumber" name="61" href="#61">61</a> Math.min(prevKeyLength, keyLength)); -<a class="jxr_linenumber" name="62" href="#62">62</a> -<a class="jxr_linenumber" name="63" href="#63">63</a> ByteBufferUtils.putCompressedInt(out, keyLength - common); -<a class="jxr_linenumber" name="64" href="#64">64</a> ByteBufferUtils.putCompressedInt(out, valueLength); -<a class="jxr_linenumber" name="65" href="#65">65</a> ByteBufferUtils.putCompressedInt(out, common); -<a class="jxr_linenumber" name="66" href="#66">66</a> -<a class="jxr_linenumber" name="67" href="#67">67</a> ByteBufferUtils.skip(in, common); -<a class="jxr_linenumber" name="68" href="#68">68</a> ByteBufferUtils.moveBufferToStream(out, in, keyLength - common -<a class="jxr_linenumber" name="69" href="#69">69</a> + valueLength); -<a class="jxr_linenumber" name="70" href="#70">70</a> } -<a class="jxr_linenumber" name="71" href="#71">71</a> -<a class="jxr_linenumber" name="72" href="#72">72</a> <strong class="jxr_keyword">return</strong> keyLength; -<a class="jxr_linenumber" name="73" href="#73">73</a> } +<a class="jxr_linenumber" name="42" href="#42">42</a> <em class="jxr_javadoccomment"> * In a worst case compressed KeyValue will be three bytes longer than original.</em> +<a class="jxr_linenumber" name="43" href="#43">43</a> <em class="jxr_javadoccomment"> *</em> +<a class="jxr_linenumber" name="44" href="#44">44</a> <em class="jxr_javadoccomment"> */</em> +<a class="jxr_linenumber" name="45" href="#45">45</a> @InterfaceAudience.Private +<a class="jxr_linenumber" name="46" href="#46">46</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/apache/hadoop/hbase/io/encoding/PrefixKeyDeltaEncoder.html">PrefixKeyDeltaEncoder</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../../../org/apache/hadoop/hbase/io/encoding/BufferedDataBlockEncoder.html">BufferedDataBlockEncoder</a> { +<a class="jxr_linenumber" name="47" href="#47">47</a> +<a class="jxr_linenumber" name="48" href="#48">48</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> addKV(<strong class="jxr_keyword">int</strong> prevKeyOffset, DataOutputStream out, +<a class="jxr_linenumber" name="49" href="#49">49</a> ByteBuffer in, <strong class="jxr_keyword">int</strong> prevKeyLength) <strong class="jxr_keyword">throws</strong> IOException { +<a class="jxr_linenumber" name="50" href="#50">50</a> <strong class="jxr_keyword">int</strong> keyLength = in.getInt(); +<a class="jxr_linenumber" name="51" href="#51">51</a> <strong class="jxr_keyword">int</strong> valueLength = in.getInt(); +<a class="jxr_linenumber" name="52" href="#52">52</a> +<a class="jxr_linenumber" name="53" href="#53">53</a> <strong class="jxr_keyword">if</strong> (prevKeyOffset == -1) { +<a class="jxr_linenumber" name="54" href="#54">54</a> <em class="jxr_comment">// copy the key, there is no common prefix with none</em> +<a class="jxr_linenumber" name="55" href="#55">55</a> ByteBufferUtils.putCompressedInt(out, keyLength); +<a class="jxr_linenumber" name="56" href="#56">56</a> ByteBufferUtils.putCompressedInt(out, valueLength); +<a class="jxr_linenumber" name="57" href="#57">57</a> ByteBufferUtils.putCompressedInt(out, 0); +<a class="jxr_linenumber" name="58" href="#58">58</a> ByteBufferUtils.moveBufferToStream(out, in, keyLength + valueLength); +<a class="jxr_linenumber" name="59" href="#59">59</a> } <strong class="jxr_keyword">else</strong> { +<a class="jxr_linenumber" name="60" href="#60">60</a> <em class="jxr_comment">// find a common prefix and skip it</em> +<a class="jxr_linenumber" name="61" href="#61">61</a> <strong class="jxr_keyword">int</strong> common = ByteBufferUtils.findCommonPrefix( +<a class="jxr_linenumber" name="62" href="#62">62</a> in, prevKeyOffset + KeyValue.ROW_OFFSET, +<a class="jxr_linenumber" name="63" href="#63">63</a> in.position(), +<a class="jxr_linenumber" name="64" href="#64">64</a> Math.min(prevKeyLength, keyLength)); +<a class="jxr_linenumber" name="65" href="#65">65</a> +<a class="jxr_linenumber" name="66" href="#66">66</a> ByteBufferUtils.putCompressedInt(out, keyLength - common); +<a class="jxr_linenumber" name="67" href="#67">67</a> ByteBufferUtils.putCompressedInt(out, valueLength); +<a class="jxr_linenumber" name="68" href="#68">68</a> ByteBufferUtils.putCompressedInt(out, common); +<a class="jxr_linenumber" name="69" href="#69">69</a> +<a class="jxr_linenumber" name="70" href="#70">70</a> ByteBufferUtils.skip(in, common); +<a class="jxr_linenumber" name="71" href="#71">71</a> ByteBufferUtils.moveBufferToStream(out, in, keyLength - common +<a class="jxr_linenumber" name="72" href="#72">72</a> + valueLength); +<a class="jxr_linenumber" name="73" href="#73">73</a> } <a class="jxr_linenumber" name="74" href="#74">74</a> -<a class="jxr_linenumber" name="75" href="#75">75</a> @Override -<a class="jxr_linenumber" name="76" href="#76">76</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> compressKeyValues(DataOutputStream writeHere, -<a class="jxr_linenumber" name="77" href="#77">77</a> ByteBuffer in, <strong class="jxr_keyword">boolean</strong> includesMemstoreTS) <strong class="jxr_keyword">throws</strong> IOException { -<a class="jxr_linenumber" name="78" href="#78">78</a> in.rewind(); -<a class="jxr_linenumber" name="79" href="#79">79</a> ByteBufferUtils.putInt(writeHere, in.limit()); -<a class="jxr_linenumber" name="80" href="#80">80</a> <strong class="jxr_keyword">int</strong> prevOffset = -1; -<a class="jxr_linenumber" name="81" href="#81">81</a> <strong class="jxr_keyword">int</strong> offset = 0; -<a class="jxr_linenumber" name="82" href="#82">82</a> <strong class="jxr_keyword">int</strong> keyLength = 0; -<a class="jxr_linenumber" name="83" href="#83">83</a> <strong class="jxr_keyword">while</strong> (in.hasRemaining()) { -<a class="jxr_linenumber" name="84" href="#84">84</a> offset = in.position(); -<a class="jxr_linenumber" name="85" href="#85">85</a> keyLength = addKV(prevOffset, writeHere, in, keyLength); -<a class="jxr_linenumber" name="86" href="#86">86</a> afterEncodingKeyValue(in, writeHere, includesMemstoreTS); -<a class="jxr_linenumber" name="87" href="#87">87</a> prevOffset = offset; -<a class="jxr_linenumber" name="88" href="#88">88</a> } -<a class="jxr_linenumber" name="89" href="#89">89</a> } -<a class="jxr_linenumber" name="90" href="#90">90</a> -<a class="jxr_linenumber" name="91" href="#91">91</a> @Override -<a class="jxr_linenumber" name="92" href="#92">92</a> <strong class="jxr_keyword">public</strong> ByteBuffer uncompressKeyValues(DataInputStream source, -<a class="jxr_linenumber" name="93" href="#93">93</a> <strong class="jxr_keyword">int</strong> allocHeaderLength, <strong class="jxr_keyword">int</strong> skipLastBytes, <strong class="jxr_keyword">boolean</strong> includesMemstoreTS) -<a class="jxr_linenumber" name="94" href="#94">94</a> <strong class="jxr_keyword">throws</strong> IOException { -<a class="jxr_linenumber" name="95" href="#95">95</a> <strong class="jxr_keyword">int</strong> decompressedSize = source.readInt(); -<a class="jxr_linenumber" name="96" href="#96">96</a> ByteBuffer buffer = ByteBuffer.allocate(decompressedSize + -<a class="jxr_linenumber" name="97" href="#97">97</a> allocHeaderLength); -<a class="jxr_linenumber" name="98" href="#98">98</a> buffer.position(allocHeaderLength); -<a class="jxr_linenumber" name="99" href="#99">99</a> <strong class="jxr_keyword">int</strong> prevKeyOffset = 0; -<a class="jxr_linenumber" name="100" href="#100">100</a> -<a class="jxr_linenumber" name="101" href="#101">101</a> <strong class="jxr_keyword">while</strong> (source.available() > skipLastBytes) { -<a class="jxr_linenumber" name="102" href="#102">102</a> prevKeyOffset = uncompressKeyValue(source, buffer, prevKeyOffset); -<a class="jxr_linenumber" name="103" href="#103">103</a> afterDecodingKeyValue(source, buffer, includesMemstoreTS); -<a class="jxr_linenumber" name="104" href="#104">104</a> } -<a class="jxr_linenumber" name="105" href="#105">105</a> -<a class="jxr_linenumber" name="106" href="#106">106</a> <strong class="jxr_keyword">if</strong> (source.available() != skipLastBytes) { -<a class="jxr_linenumber" name="107" href="#107">107</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(<span class="jxr_string">"Read too many bytes."</span>); -<a class="jxr_linenumber" name="108" href="#108">108</a> } -<a class="jxr_linenumber" name="109" href="#109">109</a> -<a class="jxr_linenumber" name="110" href="#110">110</a> buffer.limit(buffer.position()); -<a class="jxr_linenumber" name="111" href="#111">111</a> <strong class="jxr_keyword">return</strong> buffer; -<a class="jxr_linenumber" name="112" href="#112">112</a> } -<a class="jxr_linenumber" name="113" href="#113">113</a> -<a class="jxr_linenumber" name="114" href="#114">114</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> uncompressKeyValue(DataInputStream source, ByteBuffer buffer, -<a class="jxr_linenumber" name="115" href="#115">115</a> <strong class="jxr_keyword">int</strong> prevKeyOffset) -<a class="jxr_linenumber" name="116" href="#116">116</a> <strong class="jxr_keyword">throws</strong> IOException, <a href="../../../../../../org/apache/hadoop/hbase/io/encoding/EncoderBufferTooSmallException.html">EncoderBufferTooSmallException</a> { -<a class="jxr_linenumber" name="117" href="#117">117</a> <strong class="jxr_keyword">int</strong> keyLength = ByteBufferUtils.readCompressedInt(source); -<a class="jxr_linenumber" name="118" href="#118">118</a> <strong class="jxr_keyword">int</strong> valueLength = ByteBufferUtils.readCompressedInt(source); -<a class="jxr_linenumber" name="119" href="#119">119</a> <strong class="jxr_keyword">int</strong> commonLength = ByteBufferUtils.readCompressedInt(source); -<a class="jxr_linenumber" name="120" href="#120">120</a> <strong class="jxr_keyword">int</strong> keyOffset; -<a class="jxr_linenumber" name="121" href="#121">121</a> keyLength += commonLength; -<a class="jxr_linenumber" name="122" href="#122">122</a> -<a class="jxr_linenumber" name="123" href="#123">123</a> ByteBufferUtils.ensureSpace(buffer, keyLength + valueLength -<a class="jxr_linenumber" name="124" href="#124">124</a> + KeyValue.ROW_OFFSET); +<a class="jxr_linenumber" name="75" href="#75">75</a> <strong class="jxr_keyword">return</strong> keyLength; +<a class="jxr_linenumber" name="76" href="#76">76</a> } +<a class="jxr_linenumber" name="77" href="#77">77</a> +<a class="jxr_linenumber" name="78" href="#78">78</a> @Override +<a class="jxr_linenumber" name="79" href="#79">79</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> compressKeyValues(DataOutputStream writeHere, +<a class="jxr_linenumber" name="80" href="#80">80</a> ByteBuffer in, <strong class="jxr_keyword">boolean</strong> includesMemstoreTS) <strong class="jxr_keyword">throws</strong> IOException { +<a class="jxr_linenumber" name="81" href="#81">81</a> in.rewind(); +<a class="jxr_linenumber" name="82" href="#82">82</a> ByteBufferUtils.putInt(writeHere, in.limit()); +<a class="jxr_linenumber" name="83" href="#83">83</a> <strong class="jxr_keyword">int</strong> prevOffset = -1; +<a class="jxr_linenumber" name="84" href="#84">84</a> <strong class="jxr_keyword">int</strong> offset = 0; +<a class="jxr_linenumber" name="85" href="#85">85</a> <strong class="jxr_keyword">int</strong> keyLength = 0; +<a class="jxr_linenumber" name="86" href="#86">86</a> <strong class="jxr_keyword">while</strong> (in.hasRemaining()) { +<a class="jxr_linenumber" name="87" href="#87">87</a> offset = in.position(); +<a class="jxr_linenumber" name="88" href="#88">88</a> keyLength = addKV(prevOffset, writeHere, in, keyLength); +<a class="jxr_linenumber" name="89" href="#89">89</a> afterEncodingKeyValue(in, writeHere, includesMemstoreTS); +<a class="jxr_linenumber" name="90" href="#90">90</a> prevOffset = offset; +<a class="jxr_linenumber" name="91" href="#91">91</a> } +<a class="jxr_linenumber" name="92" href="#92">92</a> } +<a class="jxr_linenumber" name="93" href="#93">93</a> +<a class="jxr_linenumber" name="94" href="#94">94</a> @Override +<a class="jxr_linenumber" name="95" href="#95">95</a> <strong class="jxr_keyword">public</strong> ByteBuffer uncompressKeyValues(DataInputStream source, +<a class="jxr_linenumber" name="96" href="#96">96</a> <strong class="jxr_keyword">int</strong> allocHeaderLength, <strong class="jxr_keyword">int</strong> skipLastBytes, <strong class="jxr_keyword">boolean</strong> includesMemstoreTS) +<a class="jxr_linenumber" name="97" href="#97">97</a> <strong class="jxr_keyword">throws</strong> IOException { +<a class="jxr_linenumber" name="98" href="#98">98</a> <strong class="jxr_keyword">int</strong> decompressedSize = source.readInt(); +<a class="jxr_linenumber" name="99" href="#99">99</a> ByteBuffer buffer = ByteBuffer.allocate(decompressedSize + +<a class="jxr_linenumber" name="100" href="#100">100</a> allocHeaderLength); +<a class="jxr_linenumber" name="101" href="#101">101</a> buffer.position(allocHeaderLength); +<a class="jxr_linenumber" name="102" href="#102">102</a> <strong class="jxr_keyword">int</strong> prevKeyOffset = 0; +<a class="jxr_linenumber" name="103" href="#103">103</a> +<a class="jxr_linenumber" name="104" href="#104">104</a> <strong class="jxr_keyword">while</strong> (source.available() > skipLastBytes) { +<a class="jxr_linenumber" name="105" href="#105">105</a> prevKeyOffset = uncompressKeyValue(source, buffer, prevKeyOffset); +<a class="jxr_linenumber" name="106" href="#106">106</a> afterDecodingKeyValue(source, buffer, includesMemstoreTS); +<a class="jxr_linenumber" name="107" href="#107">107</a> } +<a class="jxr_linenumber" name="108" href="#108">108</a> +<a class="jxr_linenumber" name="109" href="#109">109</a> <strong class="jxr_keyword">if</strong> (source.available() != skipLastBytes) { +<a class="jxr_linenumber" name="110" href="#110">110</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(<span class="jxr_string">"Read too many bytes."</span>); +<a class="jxr_linenumber" name="111" href="#111">111</a> } +<a class="jxr_linenumber" name="112" href="#112">112</a> +<a class="jxr_linenumber" name="113" href="#113">113</a> buffer.limit(buffer.position()); +<a class="jxr_linenumber" name="114" href="#114">114</a> <strong class="jxr_keyword">return</strong> buffer; +<a class="jxr_linenumber" name="115" href="#115">115</a> } +<a class="jxr_linenumber" name="116" href="#116">116</a> +<a class="jxr_linenumber" name="117" href="#117">117</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> uncompressKeyValue(DataInputStream source, ByteBuffer buffer, +<a class="jxr_linenumber" name="118" href="#118">118</a> <strong class="jxr_keyword">int</strong> prevKeyOffset) +<a class="jxr_linenumber" name="119" href="#119">119</a> <strong class="jxr_keyword">throws</strong> IOException, <a href="../../../../../../org/apache/hadoop/hbase/io/encoding/EncoderBufferTooSmallException.html">EncoderBufferTooSmallException</a> { +<a class="jxr_linenumber" name="120" href="#120">120</a> <strong class="jxr_keyword">int</strong> keyLength = ByteBufferUtils.readCompressedInt(source); +<a class="jxr_linenumber" name="121" href="#121">121</a> <strong class="jxr_keyword">int</strong> valueLength = ByteBufferUtils.readCompressedInt(source); +<a class="jxr_linenumber" name="122" href="#122">122</a> <strong class="jxr_keyword">int</strong> commonLength = ByteBufferUtils.readCompressedInt(source); +<a class="jxr_linenumber" name="123" href="#123">123</a> <strong class="jxr_keyword">int</strong> keyOffset; +<a class="jxr_linenumber" name="124" href="#124">124</a> keyLength += commonLength; <a class="jxr_linenumber" name="125" href="#125">125</a> -<a class="jxr_linenumber" name="126" href="#126">126</a> buffer.putInt(keyLength); -<a class="jxr_linenumber" name="127" href="#127">127</a> buffer.putInt(valueLength); +<a class="jxr_linenumber" name="126" href="#126">126</a> ByteBufferUtils.ensureSpace(buffer, keyLength + valueLength +<a class="jxr_linenumber" name="127" href="#127">127</a> + KeyValue.ROW_OFFSET); <a class="jxr_linenumber" name="128" href="#128">128</a> -<a class="jxr_linenumber" name="129" href="#129">129</a> <em class="jxr_comment">// copy the prefix</em> -<a class="jxr_linenumber" name="130" href="#130">130</a> <strong class="jxr_keyword">if</strong> (commonLength > 0) { -<a class="jxr_linenumber" name="131" href="#131">131</a> keyOffset = buffer.position(); -<a class="jxr_linenumber" name="132" href="#132">132</a> ByteBufferUtils.copyFromBufferToBuffer(buffer, buffer, prevKeyOffset, -<a class="jxr_linenumber" name="133" href="#133">133</a> commonLength); -<a class="jxr_linenumber" name="134" href="#134">134</a> } <strong class="jxr_keyword">else</strong> { -<a class="jxr_linenumber" name="135" href="#135">135</a> keyOffset = buffer.position(); -<a class="jxr_linenumber" name="136" href="#136">136</a> } -<a class="jxr_linenumber" name="137" href="#137">137</a> -<a class="jxr_linenumber" name="138" href="#138">138</a> <em class="jxr_comment">// copy rest of the key and value</em> -<a class="jxr_linenumber" name="139" href="#139">139</a> <strong class="jxr_keyword">int</strong> len = keyLength - commonLength + valueLength; -<a class="jxr_linenumber" name="140" href="#140">140</a> ByteBufferUtils.copyFromStreamToBuffer(buffer, source, len); -<a class="jxr_linenumber" name="141" href="#141">141</a> <strong class="jxr_keyword">return</strong> keyOffset; -<a class="jxr_linenumber" name="142" href="#142">142</a> } -<a class="jxr_linenumber" name="143" href="#143">143</a> -<a class="jxr_linenumber" name="144" href="#144">144</a> @Override -<a class="jxr_linenumber" name="145" href="#145">145</a> <strong class="jxr_keyword">public</strong> ByteBuffer getFirstKeyInBlock(ByteBuffer block) { -<a class="jxr_linenumber" name="146" href="#146">146</a> block.mark(); -<a class="jxr_linenumber" name="147" href="#147">147</a> block.position(Bytes.SIZEOF_INT); -<a class="jxr_linenumber" name="148" href="#148">148</a> <strong class="jxr_keyword">int</strong> keyLength = ByteBufferUtils.readCompressedInt(block); -<a class="jxr_linenumber" name="149" href="#149">149</a> ByteBufferUtils.readCompressedInt(block); -<a class="jxr_linenumber" name="150" href="#150">150</a> <strong class="jxr_keyword">int</strong> commonLength = ByteBufferUtils.readCompressedInt(block); -<a class="jxr_linenumber" name="151" href="#151">151</a> <strong class="jxr_keyword">if</strong> (commonLength != 0) { -<a class="jxr_linenumber" name="152" href="#152">152</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> AssertionError(<span class="jxr_string">"Nonzero common length in the first key in "</span> -<a class="jxr_linenumber" name="153" href="#153">153</a> + <span class="jxr_string">"block: "</span> + commonLength); -<a class="jxr_linenumber" name="154" href="#154">154</a> } -<a class="jxr_linenumber" name="155" href="#155">155</a> <strong class="jxr_keyword">int</strong> pos = block.position(); -<a class="jxr_linenumber" name="156" href="#156">156</a> block.reset(); -<a class="jxr_linenumber" name="157" href="#157">157</a> <strong class="jxr_keyword">return</strong> ByteBuffer.wrap(block.array(), block.arrayOffset() + pos, keyLength).slice(); -<a class="jxr_linenumber" name="158" href="#158">158</a> } -<a class="jxr_linenumber" name="159" href="#159">159</a> -<a class="jxr_linenumber" name="160" href="#160">160</a> @Override -<a class="jxr_linenumber" name="161" href="#161">161</a> <strong class="jxr_keyword">public</strong> String toString() { -<a class="jxr_linenumber" name="162" href="#162">162</a> <strong class="jxr_keyword">return</strong> PrefixKeyDeltaEncoder.<strong class="jxr_keyword">class</strong>.getSimpleName(); -<a class="jxr_linenumber" name="163" href="#163">163</a> } -<a class="jxr_linenumber" name="164" href="#164">164</a> -<a class="jxr_linenumber" name="165" href="#165">165</a> @Override -<a class="jxr_linenumber" name="166" href="#166">166</a> <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/apache/hadoop/hbase/io/encoding/DataBlockEncoder.html">EncodedSeeker</a> createSeeker(RawComparator<byte[]> comparator, -<a class="jxr_linenumber" name="167" href="#167">167</a> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> includesMemstoreTS) { -<a class="jxr_linenumber" name="168" href="#168">168</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> BufferedEncodedSeeker<SeekerState>(comparator) { -<a class="jxr_linenumber" name="169" href="#169">169</a> @Override -<a class="jxr_linenumber" name="170" href="#170">170</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> decodeNext() { -<a class="jxr_linenumber" name="171" href="#171">171</a> current.keyLength = ByteBufferUtils.readCompressedInt(currentBuffer); -<a class="jxr_linenumber" name="172" href="#172">172</a> current.valueLength = ByteBufferUtils.readCompressedInt(currentBuffer); -<a class="jxr_linenumber" name="173" href="#173">173</a> current.lastCommonPrefix = -<a class="jxr_linenumber" name="174" href="#174">174</a> ByteBufferUtils.readCompressedInt(currentBuffer); -<a class="jxr_linenumber" name="175" href="#175">175</a> current.keyLength += current.lastCommonPrefix; -<a class="jxr_linenumber" name="176" href="#176">176</a> current.ensureSpaceForKey(); -<a class="jxr_linenumber" name="177" href="#177">177</a> currentBuffer.get(current.keyBuffer, current.lastCommonPrefix, -<a class="jxr_linenumber" name="178" href="#178">178</a> current.keyLength - current.lastCommonPrefix); -<a class="jxr_linenumber" name="179" href="#179">179</a> current.valueOffset = currentBuffer.position(); -<a class="jxr_linenumber" name="180" href="#180">180</a> ByteBufferUtils.skip(currentBuffer, current.valueLength); -<a class="jxr_linenumber" name="181" href="#181">181</a> <strong class="jxr_keyword">if</strong> (includesMemstoreTS) { -<a class="jxr_linenumber" name="182" href="#182">182</a> current.memstoreTS = ByteBufferUtils.readVLong(currentBuffer); -<a class="jxr_linenumber" name="183" href="#183">183</a> } <strong class="jxr_keyword">else</strong> { -<a class="jxr_linenumber" name="184" href="#184">184</a> current.memstoreTS = 0; -<a class="jxr_linenumber" name="185" href="#185">185</a> } -<a class="jxr_linenumber" name="186" href="#186">186</a> current.nextKvOffset = currentBuffer.position(); -<a class="jxr_linenumber" name="187" href="#187">187</a> } -<a class="jxr_linenumber" name="188" href="#188">188</a> -<a class="jxr_linenumber" name="189" href="#189">189</a> @Override -<a class="jxr_linenumber" name="190" href="#190">190</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> decodeFirst() { -<a class="jxr_linenumber" name="191" href="#191">191</a> ByteBufferUtils.skip(currentBuffer, Bytes.SIZEOF_INT); -<a class="jxr_linenumber" name="192" href="#192">192</a> decodeNext(); -<a class="jxr_linenumber" name="193" href="#193">193</a> } -<a class="jxr_linenumber" name="194" href="#194">194</a> }; -<a class="jxr_linenumber" name="195" href="#195">195</a> } -<a class="jxr_linenumber" name="196" href="#196">196</a> } +<a class="jxr_linenumber" name="129" href="#129">129</a> buffer.putInt(keyLength); +<a class="jxr_linenumber" name="130" href="#130">130</a> buffer.putInt(valueLength); +<a class="jxr_linenumber" name="131" href="#131">131</a> +<a class="jxr_linenumber" name="132" href="#132">132</a> <em class="jxr_comment">// copy the prefix</em> +<a class="jxr_linenumber" name="133" href="#133">133</a> <strong class="jxr_keyword">if</strong> (commonLength > 0) { +<a class="jxr_linenumber" name="134" href="#134">134</a> keyOffset = buffer.position(); +<a class="jxr_linenumber" name="135" href="#135">135</a> ByteBufferUtils.copyFromBufferToBuffer(buffer, buffer, prevKeyOffset, +<a class="jxr_linenumber" name="136" href="#136">136</a> commonLength); +<a class="jxr_linenumber" name="137" href="#137">137</a> } <strong class="jxr_keyword">else</strong> { +<a class="jxr_linenumber" name="138" href="#138">138</a> keyOffset = buffer.position(); +<a class="jxr_linenumber" name="139" href="#139">139</a> } +<a class="jxr_linenumber" name="140" href="#140">140</a> +<a class="jxr_linenumber" name="141" href="#141">141</a> <em class="jxr_comment">// copy rest of the key and value</em> +<a class="jxr_linenumber" name="142" href="#142">142</a> <strong class="jxr_keyword">int</strong> len = keyLength - commonLength + valueLength; +<a class="jxr_linenumber" name="143" href="#143">143</a> ByteBufferUtils.copyFromStreamToBuffer(buffer, source, len); +<a class="jxr_linenumber" name="144" href="#144">144</a> <strong class="jxr_keyword">return</strong> keyOffset; +<a class="jxr_linenumber" name="145" href="#145">145</a> } +<a class="jxr_linenumber" name="146" href="#146">146</a> +<a class="jxr_linenumber" name="147" href="#147">147</a> @Override +<a class="jxr_linenumber" name="148" href="#148">148</a> <strong class="jxr_keyword">public</strong> ByteBuffer getFirstKeyInBlock(ByteBuffer block) { +<a class="jxr_linenumber" name="149" href="#149">149</a> block.mark(); +<a class="jxr_linenumber" name="150" href="#150">150</a> block.position(Bytes.SIZEOF_INT); +<a class="jxr_linenumber" name="151" href="#151">151</a> <strong class="jxr_keyword">int</strong> keyLength = ByteBufferUtils.readCompressedInt(block); +<a class="jxr_linenumber" name="152" href="#152">152</a> ByteBufferUtils.readCompressedInt(block); +<a class="jxr_linenumber" name="153" href="#153">153</a> <strong class="jxr_keyword">int</strong> commonLength = ByteBufferUtils.readCompressedInt(block); +<a class="jxr_linenumber" name="154" href="#154">154</a> <strong class="jxr_keyword">if</strong> (commonLength != 0) { +<a class="jxr_linenumber" name="155" href="#155">155</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> AssertionError(<span class="jxr_string">"Nonzero common length in the first key in "</span> +<a class="jxr_linenumber" name="156" href="#156">156</a> + <span class="jxr_string">"block: "</span> + commonLength); +<a class="jxr_linenumber" name="157" href="#157">157</a> } +<a class="jxr_linenumber" name="158" href="#158">158</a> <strong class="jxr_keyword">int</strong> pos = block.position(); +<a class="jxr_linenumber" name="159" href="#159">159</a> block.reset(); +<a class="jxr_linenumber" name="160" href="#160">160</a> <strong class="jxr_keyword">return</strong> ByteBuffer.wrap(block.array(), block.arrayOffset() + pos, keyLength).slice(); +<a class="jxr_linenumber" name="161" href="#161">161</a> } +<a class="jxr_linenumber" name="162" href="#162">162</a> +<a class="jxr_linenumber" name="163" href="#163">163</a> @Override +<a class="jxr_linenumber" name="164" href="#164">164</a> <strong class="jxr_keyword">public</strong> String toString() { +<a class="jxr_linenumber" name="165" href="#165">165</a> <strong class="jxr_keyword">return</strong> PrefixKeyDeltaEncoder.<strong class="jxr_keyword">class</strong>.getSimpleName(); +<a class="jxr_linenumber" name="166" href="#166">166</a> } +<a class="jxr_linenumber" name="167" href="#167">167</a> +<a class="jxr_linenumber" name="168" href="#168">168</a> @Override +<a class="jxr_linenumber" name="169" href="#169">169</a> <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/apache/hadoop/hbase/io/encoding/DataBlockEncoder.html">EncodedSeeker</a> createSeeker(RawComparator<byte[]> comparator, +<a class="jxr_linenumber" name="170" href="#170">170</a> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> includesMemstoreTS) { +<a class="jxr_linenumber" name="171" href="#171">171</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> BufferedEncodedSeeker<SeekerState>(comparator) { +<a class="jxr_linenumber" name="172" href="#172">172</a> @Override +<a class="jxr_linenumber" name="173" href="#173">173</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> decodeNext() { +<a class="jxr_linenumber" name="174" href="#174">174</a> current.keyLength = ByteBufferUtils.readCompressedInt(currentBuffer); +<a class="jxr_linenumber" name="175" href="#175">175</a> current.valueLength = ByteBufferUtils.readCompressedInt(currentBuffer); +<a class="jxr_linenumber" name="176" href="#176">176</a> current.lastCommonPrefix = +<a class="jxr_linenumber" name="177" href="#177">177</a> ByteBufferUtils.readCompressedInt(currentBuffer); +<a class="jxr_linenumber" name="178" href="#178">178</a> current.keyLength += current.lastCommonPrefix; +<a class="jxr_linenumber" name="179" href="#179">179</a> current.ensureSpaceForKey(); +<a class="jxr_linenumber" name="180" href="#180">180</a> currentBuffer.get(current.keyBuffer, current.lastCommonPrefix, +<a class="jxr_linenumber" name="181" href="#181">181</a> current.keyLength - current.lastCommonPrefix); +<a class="jxr_linenumber" name="182" href="#182">182</a> current.valueOffset = currentBuffer.position(); +<a class="jxr_linenumber" name="183" href="#183">183</a> ByteBufferUtils.skip(currentBuffer, current.valueLength); +<a class="jxr_linenumber" name="184" href="#184">184</a> <strong class="jxr_keyword">if</strong> (includesMemstoreTS) { +<a class="jxr_linenumber" name="185" href="#185">185</a> current.memstoreTS = ByteBufferUtils.readVLong(currentBuffer); +<a class="jxr_linenumber" name="186" href="#186">186</a> } <strong class="jxr_keyword">else</strong> { +<a class="jxr_linenumber" name="187" href="#187">187</a> current.memstoreTS = 0; +<a class="jxr_linenumber" name="188" href="#188">188</a> } +<a class="jxr_linenumber" name="189" href="#189">189</a> current.nextKvOffset = currentBuffer.position(); +<a class="jxr_linenumber" name="190" href="#190">190</a> } +<a class="jxr_linenumber" name="191" href="#191">191</a> +<a class="jxr_linenumber" name="192" href="#192">192</a> @Override +<a class="jxr_linenumber" name="193" href="#193">193</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> decodeFirst() { +<a class="jxr_linenumber" name="194" href="#194">194</a> ByteBufferUtils.skip(currentBuffer, Bytes.SIZEOF_INT); +<a class="jxr_linenumber" name="195" href="#195">195</a> decodeNext(); +<a class="jxr_linenumber" name="196" href="#196">196</a> } +<a class="jxr_linenumber" name="197" href="#197">197</a> }; +<a class="jxr_linenumber" name="198" href="#198">198</a> } +<a class="jxr_linenumber" name="199" href="#199">199</a> } </pre> <hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/";>Maven</a></div></body> </html>
