http://git-wip-us.apache.org/repos/asf/hbase-site/blob/f183e80f/devapidocs/src-html/org/apache/hadoop/hbase/wal/RegionGroupingProvider.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/wal/RegionGroupingProvider.html b/devapidocs/src-html/org/apache/hadoop/hbase/wal/RegionGroupingProvider.html index 4fec5eb..63c9ca7 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/wal/RegionGroupingProvider.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/wal/RegionGroupingProvider.html @@ -35,254 +35,262 @@ <span class="sourceLineNo">027</span>import java.util.List;<a name="line.27"></a> <span class="sourceLineNo">028</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.28"></a> <span class="sourceLineNo">029</span>import java.util.concurrent.ConcurrentMap;<a name="line.29"></a> -<span class="sourceLineNo">030</span><a name="line.30"></a> +<span class="sourceLineNo">030</span>import java.util.concurrent.locks.Lock;<a name="line.30"></a> <span class="sourceLineNo">031</span>import org.apache.hadoop.conf.Configuration;<a name="line.31"></a> -<span class="sourceLineNo">032</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.32"></a> -<span class="sourceLineNo">033</span>import org.slf4j.Logger;<a name="line.33"></a> -<span class="sourceLineNo">034</span>import org.slf4j.LoggerFactory;<a name="line.34"></a> -<span class="sourceLineNo">035</span>// imports for classes still in regionserver.wal<a name="line.35"></a> -<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.regionserver.wal.WALActionsListener;<a name="line.36"></a> -<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.37"></a> -<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.util.IdLock;<a name="line.38"></a> -<span class="sourceLineNo">039</span><a name="line.39"></a> -<span class="sourceLineNo">040</span>/**<a name="line.40"></a> -<span class="sourceLineNo">041</span> * A WAL Provider that returns a WAL per group of regions.<a name="line.41"></a> -<span class="sourceLineNo">042</span> *<a name="line.42"></a> -<span class="sourceLineNo">043</span> * This provider follows the decorator pattern and mainly holds the logic for WAL grouping.<a name="line.43"></a> -<span class="sourceLineNo">044</span> * WAL creation/roll/close is delegated to {@link #DELEGATE_PROVIDER}<a name="line.44"></a> -<span class="sourceLineNo">045</span> *<a name="line.45"></a> -<span class="sourceLineNo">046</span> * Region grouping is handled via {@link RegionGroupingStrategy} and can be configured via the<a name="line.46"></a> -<span class="sourceLineNo">047</span> * property "hbase.wal.regiongrouping.strategy". Current strategy choices are<a name="line.47"></a> -<span class="sourceLineNo">048</span> * <ul><a name="line.48"></a> -<span class="sourceLineNo">049</span> * <li><em>defaultStrategy</em> : Whatever strategy this version of HBase picks. currently<a name="line.49"></a> -<span class="sourceLineNo">050</span> * "bounded".</li><a name="line.50"></a> -<span class="sourceLineNo">051</span> * <li><em>identity</em> : each region belongs to its own group.</li><a name="line.51"></a> -<span class="sourceLineNo">052</span> * <li><em>bounded</em> : bounded number of groups and region evenly assigned to each group.</li><a name="line.52"></a> -<span class="sourceLineNo">053</span> * </ul><a name="line.53"></a> -<span class="sourceLineNo">054</span> * Optionally, a FQCN to a custom implementation may be given.<a name="line.54"></a> -<span class="sourceLineNo">055</span> */<a name="line.55"></a> -<span class="sourceLineNo">056</span>@InterfaceAudience.Private<a name="line.56"></a> -<span class="sourceLineNo">057</span>public class RegionGroupingProvider implements WALProvider {<a name="line.57"></a> -<span class="sourceLineNo">058</span> private static final Logger LOG = LoggerFactory.getLogger(RegionGroupingProvider.class);<a name="line.58"></a> -<span class="sourceLineNo">059</span><a name="line.59"></a> -<span class="sourceLineNo">060</span> /**<a name="line.60"></a> -<span class="sourceLineNo">061</span> * Map identifiers to a group number.<a name="line.61"></a> -<span class="sourceLineNo">062</span> */<a name="line.62"></a> -<span class="sourceLineNo">063</span> public static interface RegionGroupingStrategy {<a name="line.63"></a> -<span class="sourceLineNo">064</span> String GROUP_NAME_DELIMITER = ".";<a name="line.64"></a> -<span class="sourceLineNo">065</span><a name="line.65"></a> -<span class="sourceLineNo">066</span> /**<a name="line.66"></a> -<span class="sourceLineNo">067</span> * Given an identifier and a namespace, pick a group.<a name="line.67"></a> -<span class="sourceLineNo">068</span> */<a name="line.68"></a> -<span class="sourceLineNo">069</span> String group(final byte[] identifier, byte[] namespace);<a name="line.69"></a> -<span class="sourceLineNo">070</span> void init(Configuration config, String providerId);<a name="line.70"></a> -<span class="sourceLineNo">071</span> }<a name="line.71"></a> -<span class="sourceLineNo">072</span><a name="line.72"></a> -<span class="sourceLineNo">073</span> /**<a name="line.73"></a> -<span class="sourceLineNo">074</span> * Maps between configuration names for strategies and implementation classes.<a name="line.74"></a> -<span class="sourceLineNo">075</span> */<a name="line.75"></a> -<span class="sourceLineNo">076</span> static enum Strategies {<a name="line.76"></a> -<span class="sourceLineNo">077</span> defaultStrategy(BoundedGroupingStrategy.class),<a name="line.77"></a> -<span class="sourceLineNo">078</span> identity(IdentityGroupingStrategy.class),<a name="line.78"></a> -<span class="sourceLineNo">079</span> bounded(BoundedGroupingStrategy.class),<a name="line.79"></a> -<span class="sourceLineNo">080</span> namespace(NamespaceGroupingStrategy.class);<a name="line.80"></a> -<span class="sourceLineNo">081</span><a name="line.81"></a> -<span class="sourceLineNo">082</span> final Class<? extends RegionGroupingStrategy> clazz;<a name="line.82"></a> -<span class="sourceLineNo">083</span> Strategies(Class<? extends RegionGroupingStrategy> clazz) {<a name="line.83"></a> -<span class="sourceLineNo">084</span> this.clazz = clazz;<a name="line.84"></a> -<span class="sourceLineNo">085</span> }<a name="line.85"></a> -<span class="sourceLineNo">086</span> }<a name="line.86"></a> -<span class="sourceLineNo">087</span><a name="line.87"></a> -<span class="sourceLineNo">088</span> /**<a name="line.88"></a> -<span class="sourceLineNo">089</span> * instantiate a strategy from a config property.<a name="line.89"></a> -<span class="sourceLineNo">090</span> * requires conf to have already been set (as well as anything the provider might need to read).<a name="line.90"></a> -<span class="sourceLineNo">091</span> */<a name="line.91"></a> -<span class="sourceLineNo">092</span> RegionGroupingStrategy getStrategy(final Configuration conf, final String key,<a name="line.92"></a> -<span class="sourceLineNo">093</span> final String defaultValue) throws IOException {<a name="line.93"></a> -<span class="sourceLineNo">094</span> Class<? extends RegionGroupingStrategy> clazz;<a name="line.94"></a> -<span class="sourceLineNo">095</span> try {<a name="line.95"></a> -<span class="sourceLineNo">096</span> clazz = Strategies.valueOf(conf.get(key, defaultValue)).clazz;<a name="line.96"></a> -<span class="sourceLineNo">097</span> } catch (IllegalArgumentException exception) {<a name="line.97"></a> -<span class="sourceLineNo">098</span> // Fall back to them specifying a class name<a name="line.98"></a> -<span class="sourceLineNo">099</span> // Note that the passed default class shouldn't actually be used, since the above only fails<a name="line.99"></a> -<span class="sourceLineNo">100</span> // when there is a config value present.<a name="line.100"></a> -<span class="sourceLineNo">101</span> clazz = conf.getClass(key, IdentityGroupingStrategy.class, RegionGroupingStrategy.class);<a name="line.101"></a> -<span class="sourceLineNo">102</span> }<a name="line.102"></a> -<span class="sourceLineNo">103</span> LOG.info("Instantiating RegionGroupingStrategy of type " + clazz);<a name="line.103"></a> -<span class="sourceLineNo">104</span> try {<a name="line.104"></a> -<span class="sourceLineNo">105</span> final RegionGroupingStrategy result = clazz.newInstance();<a name="line.105"></a> -<span class="sourceLineNo">106</span> result.init(conf, providerId);<a name="line.106"></a> -<span class="sourceLineNo">107</span> return result;<a name="line.107"></a> -<span class="sourceLineNo">108</span> } catch (InstantiationException exception) {<a name="line.108"></a> -<span class="sourceLineNo">109</span> LOG.error("couldn't set up region grouping strategy, check config key " +<a name="line.109"></a> -<span class="sourceLineNo">110</span> REGION_GROUPING_STRATEGY);<a name="line.110"></a> -<span class="sourceLineNo">111</span> LOG.debug("Exception details for failure to load region grouping strategy.", exception);<a name="line.111"></a> -<span class="sourceLineNo">112</span> throw new IOException("couldn't set up region grouping strategy", exception);<a name="line.112"></a> -<span class="sourceLineNo">113</span> } catch (IllegalAccessException exception) {<a name="line.113"></a> -<span class="sourceLineNo">114</span> LOG.error("couldn't set up region grouping strategy, check config key " +<a name="line.114"></a> -<span class="sourceLineNo">115</span> REGION_GROUPING_STRATEGY);<a name="line.115"></a> -<span class="sourceLineNo">116</span> LOG.debug("Exception details for failure to load region grouping strategy.", exception);<a name="line.116"></a> -<span class="sourceLineNo">117</span> throw new IOException("couldn't set up region grouping strategy", exception);<a name="line.117"></a> -<span class="sourceLineNo">118</span> }<a name="line.118"></a> -<span class="sourceLineNo">119</span> }<a name="line.119"></a> -<span class="sourceLineNo">120</span><a name="line.120"></a> -<span class="sourceLineNo">121</span> public static final String REGION_GROUPING_STRATEGY = "hbase.wal.regiongrouping.strategy";<a name="line.121"></a> -<span class="sourceLineNo">122</span> public static final String DEFAULT_REGION_GROUPING_STRATEGY = Strategies.defaultStrategy.name();<a name="line.122"></a> -<span class="sourceLineNo">123</span><a name="line.123"></a> -<span class="sourceLineNo">124</span> /** delegate provider for WAL creation/roll/close */<a name="line.124"></a> -<span class="sourceLineNo">125</span> public static final String DELEGATE_PROVIDER = "hbase.wal.regiongrouping.delegate.provider";<a name="line.125"></a> -<span class="sourceLineNo">126</span> public static final String DEFAULT_DELEGATE_PROVIDER = WALFactory.Providers.defaultProvider<a name="line.126"></a> -<span class="sourceLineNo">127</span> .name();<a name="line.127"></a> -<span class="sourceLineNo">128</span><a name="line.128"></a> -<span class="sourceLineNo">129</span> private static final String META_WAL_GROUP_NAME = "meta";<a name="line.129"></a> +<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.HConstants;<a name="line.32"></a> +<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.33"></a> +<span class="sourceLineNo">034</span>// imports for classes still in regionserver.wal<a name="line.34"></a> +<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.regionserver.wal.WALActionsListener;<a name="line.35"></a> +<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.36"></a> +<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.util.KeyLocker;<a name="line.37"></a> +<span class="sourceLineNo">038</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.38"></a> +<span class="sourceLineNo">039</span>import org.slf4j.Logger;<a name="line.39"></a> +<span class="sourceLineNo">040</span>import org.slf4j.LoggerFactory;<a name="line.40"></a> +<span class="sourceLineNo">041</span><a name="line.41"></a> +<span class="sourceLineNo">042</span>/**<a name="line.42"></a> +<span class="sourceLineNo">043</span> * A WAL Provider that returns a WAL per group of regions.<a name="line.43"></a> +<span class="sourceLineNo">044</span> *<a name="line.44"></a> +<span class="sourceLineNo">045</span> * This provider follows the decorator pattern and mainly holds the logic for WAL grouping.<a name="line.45"></a> +<span class="sourceLineNo">046</span> * WAL creation/roll/close is delegated to {@link #DELEGATE_PROVIDER}<a name="line.46"></a> +<span class="sourceLineNo">047</span> *<a name="line.47"></a> +<span class="sourceLineNo">048</span> * Region grouping is handled via {@link RegionGroupingStrategy} and can be configured via the<a name="line.48"></a> +<span class="sourceLineNo">049</span> * property "hbase.wal.regiongrouping.strategy". Current strategy choices are<a name="line.49"></a> +<span class="sourceLineNo">050</span> * <ul><a name="line.50"></a> +<span class="sourceLineNo">051</span> * <li><em>defaultStrategy</em> : Whatever strategy this version of HBase picks. currently<a name="line.51"></a> +<span class="sourceLineNo">052</span> * "bounded".</li><a name="line.52"></a> +<span class="sourceLineNo">053</span> * <li><em>identity</em> : each region belongs to its own group.</li><a name="line.53"></a> +<span class="sourceLineNo">054</span> * <li><em>bounded</em> : bounded number of groups and region evenly assigned to each group.</li><a name="line.54"></a> +<span class="sourceLineNo">055</span> * </ul><a name="line.55"></a> +<span class="sourceLineNo">056</span> * Optionally, a FQCN to a custom implementation may be given.<a name="line.56"></a> +<span class="sourceLineNo">057</span> */<a name="line.57"></a> +<span class="sourceLineNo">058</span>@InterfaceAudience.Private<a name="line.58"></a> +<span class="sourceLineNo">059</span>public class RegionGroupingProvider implements WALProvider {<a name="line.59"></a> +<span class="sourceLineNo">060</span> private static final Logger LOG = LoggerFactory.getLogger(RegionGroupingProvider.class);<a name="line.60"></a> +<span class="sourceLineNo">061</span><a name="line.61"></a> +<span class="sourceLineNo">062</span> /**<a name="line.62"></a> +<span class="sourceLineNo">063</span> * Map identifiers to a group number.<a name="line.63"></a> +<span class="sourceLineNo">064</span> */<a name="line.64"></a> +<span class="sourceLineNo">065</span> public static interface RegionGroupingStrategy {<a name="line.65"></a> +<span class="sourceLineNo">066</span> String GROUP_NAME_DELIMITER = ".";<a name="line.66"></a> +<span class="sourceLineNo">067</span><a name="line.67"></a> +<span class="sourceLineNo">068</span> /**<a name="line.68"></a> +<span class="sourceLineNo">069</span> * Given an identifier and a namespace, pick a group.<a name="line.69"></a> +<span class="sourceLineNo">070</span> */<a name="line.70"></a> +<span class="sourceLineNo">071</span> String group(final byte[] identifier, byte[] namespace);<a name="line.71"></a> +<span class="sourceLineNo">072</span> void init(Configuration config, String providerId);<a name="line.72"></a> +<span class="sourceLineNo">073</span> }<a name="line.73"></a> +<span class="sourceLineNo">074</span><a name="line.74"></a> +<span class="sourceLineNo">075</span> /**<a name="line.75"></a> +<span class="sourceLineNo">076</span> * Maps between configuration names for strategies and implementation classes.<a name="line.76"></a> +<span class="sourceLineNo">077</span> */<a name="line.77"></a> +<span class="sourceLineNo">078</span> static enum Strategies {<a name="line.78"></a> +<span class="sourceLineNo">079</span> defaultStrategy(BoundedGroupingStrategy.class),<a name="line.79"></a> +<span class="sourceLineNo">080</span> identity(IdentityGroupingStrategy.class),<a name="line.80"></a> +<span class="sourceLineNo">081</span> bounded(BoundedGroupingStrategy.class),<a name="line.81"></a> +<span class="sourceLineNo">082</span> namespace(NamespaceGroupingStrategy.class);<a name="line.82"></a> +<span class="sourceLineNo">083</span><a name="line.83"></a> +<span class="sourceLineNo">084</span> final Class<? extends RegionGroupingStrategy> clazz;<a name="line.84"></a> +<span class="sourceLineNo">085</span> Strategies(Class<? extends RegionGroupingStrategy> clazz) {<a name="line.85"></a> +<span class="sourceLineNo">086</span> this.clazz = clazz;<a name="line.86"></a> +<span class="sourceLineNo">087</span> }<a name="line.87"></a> +<span class="sourceLineNo">088</span> }<a name="line.88"></a> +<span class="sourceLineNo">089</span><a name="line.89"></a> +<span class="sourceLineNo">090</span> /**<a name="line.90"></a> +<span class="sourceLineNo">091</span> * instantiate a strategy from a config property.<a name="line.91"></a> +<span class="sourceLineNo">092</span> * requires conf to have already been set (as well as anything the provider might need to read).<a name="line.92"></a> +<span class="sourceLineNo">093</span> */<a name="line.93"></a> +<span class="sourceLineNo">094</span> RegionGroupingStrategy getStrategy(final Configuration conf, final String key,<a name="line.94"></a> +<span class="sourceLineNo">095</span> final String defaultValue) throws IOException {<a name="line.95"></a> +<span class="sourceLineNo">096</span> Class<? extends RegionGroupingStrategy> clazz;<a name="line.96"></a> +<span class="sourceLineNo">097</span> try {<a name="line.97"></a> +<span class="sourceLineNo">098</span> clazz = Strategies.valueOf(conf.get(key, defaultValue)).clazz;<a name="line.98"></a> +<span class="sourceLineNo">099</span> } catch (IllegalArgumentException exception) {<a name="line.99"></a> +<span class="sourceLineNo">100</span> // Fall back to them specifying a class name<a name="line.100"></a> +<span class="sourceLineNo">101</span> // Note that the passed default class shouldn't actually be used, since the above only fails<a name="line.101"></a> +<span class="sourceLineNo">102</span> // when there is a config value present.<a name="line.102"></a> +<span class="sourceLineNo">103</span> clazz = conf.getClass(key, IdentityGroupingStrategy.class, RegionGroupingStrategy.class);<a name="line.103"></a> +<span class="sourceLineNo">104</span> }<a name="line.104"></a> +<span class="sourceLineNo">105</span> LOG.info("Instantiating RegionGroupingStrategy of type " + clazz);<a name="line.105"></a> +<span class="sourceLineNo">106</span> try {<a name="line.106"></a> +<span class="sourceLineNo">107</span> final RegionGroupingStrategy result = clazz.newInstance();<a name="line.107"></a> +<span class="sourceLineNo">108</span> result.init(conf, providerId);<a name="line.108"></a> +<span class="sourceLineNo">109</span> return result;<a name="line.109"></a> +<span class="sourceLineNo">110</span> } catch (InstantiationException exception) {<a name="line.110"></a> +<span class="sourceLineNo">111</span> LOG.error("couldn't set up region grouping strategy, check config key " +<a name="line.111"></a> +<span class="sourceLineNo">112</span> REGION_GROUPING_STRATEGY);<a name="line.112"></a> +<span class="sourceLineNo">113</span> LOG.debug("Exception details for failure to load region grouping strategy.", exception);<a name="line.113"></a> +<span class="sourceLineNo">114</span> throw new IOException("couldn't set up region grouping strategy", exception);<a name="line.114"></a> +<span class="sourceLineNo">115</span> } catch (IllegalAccessException exception) {<a name="line.115"></a> +<span class="sourceLineNo">116</span> LOG.error("couldn't set up region grouping strategy, check config key " +<a name="line.116"></a> +<span class="sourceLineNo">117</span> REGION_GROUPING_STRATEGY);<a name="line.117"></a> +<span class="sourceLineNo">118</span> LOG.debug("Exception details for failure to load region grouping strategy.", exception);<a name="line.118"></a> +<span class="sourceLineNo">119</span> throw new IOException("couldn't set up region grouping strategy", exception);<a name="line.119"></a> +<span class="sourceLineNo">120</span> }<a name="line.120"></a> +<span class="sourceLineNo">121</span> }<a name="line.121"></a> +<span class="sourceLineNo">122</span><a name="line.122"></a> +<span class="sourceLineNo">123</span> public static final String REGION_GROUPING_STRATEGY = "hbase.wal.regiongrouping.strategy";<a name="line.123"></a> +<span class="sourceLineNo">124</span> public static final String DEFAULT_REGION_GROUPING_STRATEGY = Strategies.defaultStrategy.name();<a name="line.124"></a> +<span class="sourceLineNo">125</span><a name="line.125"></a> +<span class="sourceLineNo">126</span> /** delegate provider for WAL creation/roll/close */<a name="line.126"></a> +<span class="sourceLineNo">127</span> public static final String DELEGATE_PROVIDER = "hbase.wal.regiongrouping.delegate.provider";<a name="line.127"></a> +<span class="sourceLineNo">128</span> public static final String DEFAULT_DELEGATE_PROVIDER = WALFactory.Providers.defaultProvider<a name="line.128"></a> +<span class="sourceLineNo">129</span> .name();<a name="line.129"></a> <span class="sourceLineNo">130</span><a name="line.130"></a> -<span class="sourceLineNo">131</span> /** A group-provider mapping, make sure one-one rather than many-one mapping */<a name="line.131"></a> -<span class="sourceLineNo">132</span> private final ConcurrentMap<String, WALProvider> cached = new ConcurrentHashMap<>();<a name="line.132"></a> -<span class="sourceLineNo">133</span><a name="line.133"></a> -<span class="sourceLineNo">134</span> private final IdLock createLock = new IdLock();<a name="line.134"></a> +<span class="sourceLineNo">131</span> private static final String META_WAL_GROUP_NAME = "meta";<a name="line.131"></a> +<span class="sourceLineNo">132</span><a name="line.132"></a> +<span class="sourceLineNo">133</span> /** A group-provider mapping, make sure one-one rather than many-one mapping */<a name="line.133"></a> +<span class="sourceLineNo">134</span> private final ConcurrentMap<String, WALProvider> cached = new ConcurrentHashMap<>();<a name="line.134"></a> <span class="sourceLineNo">135</span><a name="line.135"></a> -<span class="sourceLineNo">136</span> private RegionGroupingStrategy strategy = null;<a name="line.136"></a> -<span class="sourceLineNo">137</span> private WALFactory factory = null;<a name="line.137"></a> -<span class="sourceLineNo">138</span> private List<WALActionsListener> listeners = null;<a name="line.138"></a> -<span class="sourceLineNo">139</span> private String providerId = null;<a name="line.139"></a> -<span class="sourceLineNo">140</span> private Class<? extends WALProvider> providerClass;<a name="line.140"></a> -<span class="sourceLineNo">141</span><a name="line.141"></a> -<span class="sourceLineNo">142</span> @Override<a name="line.142"></a> -<span class="sourceLineNo">143</span> public void init(final WALFactory factory, final Configuration conf,<a name="line.143"></a> -<span class="sourceLineNo">144</span> final List<WALActionsListener> listeners, final String providerId) throws IOException {<a name="line.144"></a> -<span class="sourceLineNo">145</span> if (null != strategy) {<a name="line.145"></a> -<span class="sourceLineNo">146</span> throw new IllegalStateException("WALProvider.init should only be called once.");<a name="line.146"></a> -<span class="sourceLineNo">147</span> }<a name="line.147"></a> -<span class="sourceLineNo">148</span> this.factory = factory;<a name="line.148"></a> -<span class="sourceLineNo">149</span> this.listeners = null == listeners ? null : Collections.unmodifiableList(listeners);<a name="line.149"></a> -<span class="sourceLineNo">150</span> StringBuilder sb = new StringBuilder().append(factory.factoryId);<a name="line.150"></a> -<span class="sourceLineNo">151</span> if (providerId != null) {<a name="line.151"></a> -<span class="sourceLineNo">152</span> if (providerId.startsWith(WAL_FILE_NAME_DELIMITER)) {<a name="line.152"></a> -<span class="sourceLineNo">153</span> sb.append(providerId);<a name="line.153"></a> -<span class="sourceLineNo">154</span> } else {<a name="line.154"></a> -<span class="sourceLineNo">155</span> sb.append(WAL_FILE_NAME_DELIMITER).append(providerId);<a name="line.155"></a> -<span class="sourceLineNo">156</span> }<a name="line.156"></a> -<span class="sourceLineNo">157</span> }<a name="line.157"></a> -<span class="sourceLineNo">158</span> this.providerId = sb.toString();<a name="line.158"></a> -<span class="sourceLineNo">159</span> this.strategy = getStrategy(conf, REGION_GROUPING_STRATEGY, DEFAULT_REGION_GROUPING_STRATEGY);<a name="line.159"></a> -<span class="sourceLineNo">160</span> this.providerClass = factory.getProviderClass(DELEGATE_PROVIDER, DEFAULT_DELEGATE_PROVIDER);<a name="line.160"></a> -<span class="sourceLineNo">161</span> }<a name="line.161"></a> -<span class="sourceLineNo">162</span><a name="line.162"></a> -<span class="sourceLineNo">163</span> private WALProvider createProvider(String group) throws IOException {<a name="line.163"></a> -<span class="sourceLineNo">164</span> if (META_WAL_PROVIDER_ID.equals(providerId)) {<a name="line.164"></a> -<span class="sourceLineNo">165</span> return factory.createProvider(providerClass, listeners, META_WAL_PROVIDER_ID);<a name="line.165"></a> -<span class="sourceLineNo">166</span> } else {<a name="line.166"></a> -<span class="sourceLineNo">167</span> return factory.createProvider(providerClass, listeners, group);<a name="line.167"></a> -<span class="sourceLineNo">168</span> }<a name="line.168"></a> -<span class="sourceLineNo">169</span> }<a name="line.169"></a> -<span class="sourceLineNo">170</span><a name="line.170"></a> -<span class="sourceLineNo">171</span> @Override<a name="line.171"></a> -<span class="sourceLineNo">172</span> public List<WAL> getWALs() {<a name="line.172"></a> -<span class="sourceLineNo">173</span> 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KeyLocker<String> createLock = new KeyLocker<>();<a name="line.136"></a> +<span class="sourceLineNo">137</span><a name="line.137"></a> +<span class="sourceLineNo">138</span> private RegionGroupingStrategy strategy = null;<a name="line.138"></a> +<span class="sourceLineNo">139</span> private WALFactory factory = null;<a name="line.139"></a> +<span class="sourceLineNo">140</span> private List<WALActionsListener> listeners = null;<a name="line.140"></a> +<span class="sourceLineNo">141</span> private String providerId = null;<a name="line.141"></a> +<span class="sourceLineNo">142</span> private Class<? extends WALProvider> providerClass;<a name="line.142"></a> +<span class="sourceLineNo">143</span><a name="line.143"></a> +<span class="sourceLineNo">144</span> @Override<a name="line.144"></a> +<span class="sourceLineNo">145</span> public void init(final WALFactory factory, final Configuration conf,<a name="line.145"></a> +<span class="sourceLineNo">146</span> final List<WALActionsListener> listeners, final String providerId) throws IOException {<a name="line.146"></a> +<span class="sourceLineNo">147</span> if (null != strategy) {<a name="line.147"></a> +<span class="sourceLineNo">148</span> throw new IllegalStateException("WALProvider.init should only be called once.");<a name="line.148"></a> +<span class="sourceLineNo">149</span> }<a name="line.149"></a> +<span class="sourceLineNo">150</span> this.factory = factory;<a name="line.150"></a> +<span class="sourceLineNo">151</span> this.listeners = null == listeners ? null : Collections.unmodifiableList(listeners);<a name="line.151"></a> +<span class="sourceLineNo">152</span> StringBuilder sb = new StringBuilder().append(factory.factoryId);<a name="line.152"></a> +<span class="sourceLineNo">153</span> if (providerId != null) {<a name="line.153"></a> +<span class="sourceLineNo">154</span> if (providerId.startsWith(WAL_FILE_NAME_DELIMITER)) {<a name="line.154"></a> +<span class="sourceLineNo">155</span> sb.append(providerId);<a name="line.155"></a> +<span class="sourceLineNo">156</span> } else {<a name="line.156"></a> +<span class="sourceLineNo">157</span> sb.append(WAL_FILE_NAME_DELIMITER).append(providerId);<a name="line.157"></a> +<span class="sourceLineNo">158</span> }<a name="line.158"></a> +<span class="sourceLineNo">159</span> }<a name="line.159"></a> +<span class="sourceLineNo">160</span> this.providerId = sb.toString();<a name="line.160"></a> +<span class="sourceLineNo">161</span> this.strategy = getStrategy(conf, REGION_GROUPING_STRATEGY, DEFAULT_REGION_GROUPING_STRATEGY);<a name="line.161"></a> +<span class="sourceLineNo">162</span> this.providerClass = factory.getProviderClass(DELEGATE_PROVIDER, DEFAULT_DELEGATE_PROVIDER);<a name="line.162"></a> +<span class="sourceLineNo">163</span> }<a name="line.163"></a> +<span class="sourceLineNo">164</span><a name="line.164"></a> +<span class="sourceLineNo">165</span> private WALProvider createProvider(String group) throws 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class="sourceLineNo">235</span> throw failure;<a name="line.235"></a> +<span class="sourceLineNo">236</span> }<a name="line.236"></a> +<span class="sourceLineNo">237</span> }<a name="line.237"></a> +<span class="sourceLineNo">238</span><a name="line.238"></a> +<span class="sourceLineNo">239</span> @Override<a name="line.239"></a> +<span class="sourceLineNo">240</span> public void close() throws IOException {<a name="line.240"></a> +<span class="sourceLineNo">241</span> // save the last exception and rethrow<a name="line.241"></a> +<span class="sourceLineNo">242</span> IOException failure = null;<a name="line.242"></a> +<span class="sourceLineNo">243</span> for (WALProvider provider : cached.values()) {<a name="line.243"></a> +<span class="sourceLineNo">244</span> try {<a name="line.244"></a> +<span class="sourceLineNo">245</span> provider.close();<a name="line.245"></a> +<span class="sourceLineNo">246</span> } catch (IOException e) {<a name="line.246"></a> +<span 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class="sourceLineNo">259</span> static class IdentityGroupingStrategy implements RegionGroupingStrategy {<a name="line.259"></a> +<span class="sourceLineNo">260</span> @Override<a name="line.260"></a> +<span class="sourceLineNo">261</span> public void init(Configuration config, String providerId) {}<a name="line.261"></a> +<span class="sourceLineNo">262</span> @Override<a name="line.262"></a> +<span class="sourceLineNo">263</span> public String group(final byte[] identifier, final byte[] namespace) {<a name="line.263"></a> +<span class="sourceLineNo">264</span> return Bytes.toString(identifier);<a name="line.264"></a> <span class="sourceLineNo">265</span> }<a name="line.265"></a> -<span class="sourceLineNo">266</span> return numLogFiles;<a name="line.266"></a> -<span class="sourceLineNo">267</span> }<a name="line.267"></a> -<span class="sourceLineNo">268</span><a name="line.268"></a> -<span class="sourceLineNo">269</span> @Override<a name="line.269"></a> -<span 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