http://git-wip-us.apache.org/repos/asf/hbase-site/blob/5f45c993/devapidocs/src-html/org/apache/hadoop/hbase/client/example/RefreshHFilesClient.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/client/example/RefreshHFilesClient.html b/devapidocs/src-html/org/apache/hadoop/hbase/client/example/RefreshHFilesClient.html index 4e0832e..0c6debe 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/client/example/RefreshHFilesClient.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/client/example/RefreshHFilesClient.html @@ -30,78 +30,106 @@ <span class="sourceLineNo">022</span>import java.io.Closeable;<a name="line.22"></a> <span class="sourceLineNo">023</span>import java.io.IOException;<a name="line.23"></a> <span class="sourceLineNo">024</span>import org.apache.hadoop.conf.Configuration;<a name="line.24"></a> -<span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.HConstants;<a name="line.25"></a> -<span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.TableName;<a name="line.26"></a> -<span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.client.Connection;<a name="line.27"></a> -<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.client.ConnectionFactory;<a name="line.28"></a> -<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.client.Table;<a name="line.29"></a> -<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.client.coprocessor.Batch;<a name="line.30"></a> -<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.ipc.CoprocessorRpcUtils.BlockingRpcCallback;<a name="line.31"></a> -<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.ipc.ServerRpcController;<a name="line.32"></a> -<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.protobuf.generated.RefreshHFilesProtos;<a name="line.33"></a> -<span class="sourceLineNo">034</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.34"></a> -<span class="sourceLineNo">035</span>import org.slf4j.Logger;<a name="line.35"></a> -<span class="sourceLineNo">036</span>import org.slf4j.LoggerFactory;<a name="line.36"></a> -<span class="sourceLineNo">037</span><a name="line.37"></a> -<span class="sourceLineNo">038</span>/**<a name="line.38"></a> -<span class="sourceLineNo">039</span> * This client class is for invoking the refresh HFile function deployed on the<a name="line.39"></a> -<span class="sourceLineNo">040</span> * Region Server side via the RefreshHFilesService.<a name="line.40"></a> -<span class="sourceLineNo">041</span> */<a name="line.41"></a> -<span class="sourceLineNo">042</span>@InterfaceAudience.Private<a name="line.42"></a> -<span class="sourceLineNo">043</span>public class RefreshHFilesClient implements Closeable {<a name="line.43"></a> -<span class="sourceLineNo">044</span> private static final Logger LOG = LoggerFactory.getLogger(RefreshHFilesClient.class);<a name="line.44"></a> -<span class="sourceLineNo">045</span> private final Connection connection;<a name="line.45"></a> -<span class="sourceLineNo">046</span><a name="line.46"></a> -<span class="sourceLineNo">047</span> /**<a name="line.47"></a> -<span class="sourceLineNo">048</span> * Constructor with Conf object<a name="line.48"></a> -<span class="sourceLineNo">049</span> *<a name="line.49"></a> -<span class="sourceLineNo">050</span> * @param cfg<a name="line.50"></a> -<span class="sourceLineNo">051</span> */<a name="line.51"></a> -<span class="sourceLineNo">052</span> public RefreshHFilesClient(Configuration cfg) {<a name="line.52"></a> -<span class="sourceLineNo">053</span> try {<a name="line.53"></a> -<span class="sourceLineNo">054</span> this.connection = ConnectionFactory.createConnection(cfg);<a name="line.54"></a> -<span class="sourceLineNo">055</span> } catch (IOException e) {<a name="line.55"></a> -<span class="sourceLineNo">056</span> throw new RuntimeException(e);<a name="line.56"></a> -<span class="sourceLineNo">057</span> }<a name="line.57"></a> -<span class="sourceLineNo">058</span> }<a name="line.58"></a> -<span class="sourceLineNo">059</span><a name="line.59"></a> -<span class="sourceLineNo">060</span> @Override<a name="line.60"></a> -<span class="sourceLineNo">061</span> public void close() throws IOException {<a name="line.61"></a> -<span class="sourceLineNo">062</span> if (this.connection != null && !this.connection.isClosed()) {<a name="line.62"></a> -<span class="sourceLineNo">063</span> this.connection.close();<a name="line.63"></a> -<span class="sourceLineNo">064</span> }<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> public void refreshHFiles(final TableName tableName) throws Throwable {<a name="line.67"></a> -<span class="sourceLineNo">068</span> try (Table table = connection.getTable(tableName)) {<a name="line.68"></a> -<span class="sourceLineNo">069</span> refreshHFiles(table);<a name="line.69"></a> -<span class="sourceLineNo">070</span> }<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> public void refreshHFiles(final Table table) throws Throwable {<a name="line.73"></a> -<span class="sourceLineNo">074</span> final RefreshHFilesProtos.RefreshHFilesRequest request = RefreshHFilesProtos.RefreshHFilesRequest<a name="line.74"></a> -<span class="sourceLineNo">075</span> .getDefaultInstance();<a name="line.75"></a> -<span class="sourceLineNo">076</span> table.coprocessorService(RefreshHFilesProtos.RefreshHFilesService.class, HConstants.EMPTY_START_ROW,<a name="line.76"></a> -<span class="sourceLineNo">077</span> HConstants.EMPTY_END_ROW,<a name="line.77"></a> -<span class="sourceLineNo">078</span> new Batch.Call<RefreshHFilesProtos.RefreshHFilesService,<a name="line.78"></a> -<span class="sourceLineNo">079</span> RefreshHFilesProtos.RefreshHFilesResponse>() {<a name="line.79"></a> -<span class="sourceLineNo">080</span> @Override<a name="line.80"></a> -<span class="sourceLineNo">081</span> public RefreshHFilesProtos.RefreshHFilesResponse call(<a name="line.81"></a> -<span class="sourceLineNo">082</span> RefreshHFilesProtos.RefreshHFilesService refreshHFilesService)<a name="line.82"></a> -<span class="sourceLineNo">083</span> throws IOException {<a name="line.83"></a> -<span class="sourceLineNo">084</span> ServerRpcController controller = new ServerRpcController();<a name="line.84"></a> -<span class="sourceLineNo">085</span> BlockingRpcCallback<RefreshHFilesProtos.RefreshHFilesResponse> rpcCallback =<a name="line.85"></a> -<span class="sourceLineNo">086</span> new BlockingRpcCallback<>();<a name="line.86"></a> -<span class="sourceLineNo">087</span> refreshHFilesService.refreshHFiles(controller, request, rpcCallback);<a name="line.87"></a> -<span class="sourceLineNo">088</span> if (controller.failedOnException()) {<a name="line.88"></a> -<span class="sourceLineNo">089</span> throw controller.getFailedOn();<a name="line.89"></a> -<span class="sourceLineNo">090</span> }<a name="line.90"></a> -<span class="sourceLineNo">091</span> return rpcCallback.get();<a name="line.91"></a> -<span class="sourceLineNo">092</span> }<a name="line.92"></a> -<span class="sourceLineNo">093</span> });<a name="line.93"></a> -<span class="sourceLineNo">094</span> LOG.debug("Done refreshing HFiles");<a name="line.94"></a> -<span class="sourceLineNo">095</span> }<a name="line.95"></a> -<span class="sourceLineNo">096</span>}<a name="line.96"></a> +<span class="sourceLineNo">025</span>import org.apache.hadoop.conf.Configured;<a name="line.25"></a> +<span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.26"></a> +<span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.HConstants;<a name="line.27"></a> +<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.TableName;<a name="line.28"></a> +<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.client.Connection;<a name="line.29"></a> +<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.client.ConnectionFactory;<a name="line.30"></a> +<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.client.Table;<a name="line.31"></a> +<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.client.coprocessor.Batch;<a name="line.32"></a> +<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.ipc.CoprocessorRpcUtils.BlockingRpcCallback;<a name="line.33"></a> +<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.ipc.ServerRpcController;<a name="line.34"></a> +<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.protobuf.generated.RefreshHFilesProtos;<a name="line.35"></a> +<span class="sourceLineNo">036</span>import org.apache.hadoop.util.Tool;<a name="line.36"></a> +<span class="sourceLineNo">037</span>import org.apache.hadoop.util.ToolRunner;<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> * This client class is for invoking the refresh HFile function deployed on the<a name="line.43"></a> +<span class="sourceLineNo">044</span> * Region Server side via the RefreshHFilesService.<a name="line.44"></a> +<span class="sourceLineNo">045</span> */<a name="line.45"></a> +<span class="sourceLineNo">046</span>@InterfaceAudience.Private<a name="line.46"></a> +<span class="sourceLineNo">047</span>public class RefreshHFilesClient extends Configured implements Tool, Closeable {<a name="line.47"></a> +<span class="sourceLineNo">048</span> private static final Logger LOG = LoggerFactory.getLogger(RefreshHFilesClient.class);<a name="line.48"></a> +<span class="sourceLineNo">049</span> private final Connection connection;<a name="line.49"></a> +<span class="sourceLineNo">050</span><a name="line.50"></a> +<span class="sourceLineNo">051</span> /**<a name="line.51"></a> +<span class="sourceLineNo">052</span> * Constructor with Conf object<a name="line.52"></a> +<span class="sourceLineNo">053</span> *<a name="line.53"></a> +<span class="sourceLineNo">054</span> * @param cfg<a name="line.54"></a> +<span class="sourceLineNo">055</span> */<a name="line.55"></a> +<span class="sourceLineNo">056</span> public RefreshHFilesClient(Configuration cfg) {<a name="line.56"></a> +<span class="sourceLineNo">057</span> try {<a name="line.57"></a> +<span class="sourceLineNo">058</span> this.connection = ConnectionFactory.createConnection(cfg);<a name="line.58"></a> +<span class="sourceLineNo">059</span> } catch (IOException e) {<a name="line.59"></a> +<span class="sourceLineNo">060</span> throw new RuntimeException(e);<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><a name="line.63"></a> +<span class="sourceLineNo">064</span> @Override<a name="line.64"></a> +<span class="sourceLineNo">065</span> public void close() throws IOException {<a name="line.65"></a> +<span class="sourceLineNo">066</span> if (this.connection != null && !this.connection.isClosed()) {<a name="line.66"></a> +<span class="sourceLineNo">067</span> this.connection.close();<a name="line.67"></a> +<span class="sourceLineNo">068</span> }<a name="line.68"></a> +<span class="sourceLineNo">069</span> }<a name="line.69"></a> +<span class="sourceLineNo">070</span><a name="line.70"></a> +<span class="sourceLineNo">071</span> public void refreshHFiles(final TableName tableName) throws Throwable {<a name="line.71"></a> +<span class="sourceLineNo">072</span> try (Table table = connection.getTable(tableName)) {<a name="line.72"></a> +<span class="sourceLineNo">073</span> refreshHFiles(table);<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><a name="line.76"></a> +<span class="sourceLineNo">077</span> public void refreshHFiles(final Table table) throws Throwable {<a name="line.77"></a> +<span class="sourceLineNo">078</span> final RefreshHFilesProtos.RefreshHFilesRequest request = RefreshHFilesProtos.RefreshHFilesRequest<a name="line.78"></a> +<span class="sourceLineNo">079</span> .getDefaultInstance();<a name="line.79"></a> +<span class="sourceLineNo">080</span> table.coprocessorService(RefreshHFilesProtos.RefreshHFilesService.class, HConstants.EMPTY_START_ROW,<a name="line.80"></a> +<span class="sourceLineNo">081</span> HConstants.EMPTY_END_ROW,<a name="line.81"></a> +<span class="sourceLineNo">082</span> new Batch.Call<RefreshHFilesProtos.RefreshHFilesService,<a name="line.82"></a> +<span class="sourceLineNo">083</span> RefreshHFilesProtos.RefreshHFilesResponse>() {<a name="line.83"></a> +<span class="sourceLineNo">084</span> @Override<a name="line.84"></a> +<span class="sourceLineNo">085</span> public RefreshHFilesProtos.RefreshHFilesResponse call(<a name="line.85"></a> +<span class="sourceLineNo">086</span> RefreshHFilesProtos.RefreshHFilesService refreshHFilesService)<a name="line.86"></a> +<span class="sourceLineNo">087</span> throws IOException {<a name="line.87"></a> +<span class="sourceLineNo">088</span> ServerRpcController controller = new ServerRpcController();<a name="line.88"></a> +<span class="sourceLineNo">089</span> BlockingRpcCallback<RefreshHFilesProtos.RefreshHFilesResponse> rpcCallback =<a name="line.89"></a> +<span class="sourceLineNo">090</span> new BlockingRpcCallback<>();<a name="line.90"></a> +<span class="sourceLineNo">091</span> refreshHFilesService.refreshHFiles(controller, request, rpcCallback);<a name="line.91"></a> +<span class="sourceLineNo">092</span> if (controller.failedOnException()) {<a name="line.92"></a> +<span class="sourceLineNo">093</span> throw controller.getFailedOn();<a name="line.93"></a> +<span class="sourceLineNo">094</span> }<a name="line.94"></a> +<span class="sourceLineNo">095</span> return rpcCallback.get();<a name="line.95"></a> +<span class="sourceLineNo">096</span> }<a name="line.96"></a> +<span class="sourceLineNo">097</span> });<a name="line.97"></a> +<span class="sourceLineNo">098</span> LOG.debug("Done refreshing HFiles");<a name="line.98"></a> +<span class="sourceLineNo">099</span> }<a name="line.99"></a> +<span class="sourceLineNo">100</span><a name="line.100"></a> +<span class="sourceLineNo">101</span> @Override<a name="line.101"></a> +<span class="sourceLineNo">102</span> public int run(String[] args) throws Exception {<a name="line.102"></a> +<span class="sourceLineNo">103</span> if (args.length != 1) {<a name="line.103"></a> +<span class="sourceLineNo">104</span> String message = "When there are multiple HBase clusters are sharing a common root dir, "<a name="line.104"></a> +<span class="sourceLineNo">105</span> + "especially for read replica cluster (see detail in HBASE-18477), please consider to "<a name="line.105"></a> +<span class="sourceLineNo">106</span> + "use this tool manually sync the flushed HFiles from the source cluster.";<a name="line.106"></a> +<span class="sourceLineNo">107</span> message += "\nUsage: " + this.getClass().getName() + " tableName";<a name="line.107"></a> +<span class="sourceLineNo">108</span> System.out.println(message);<a name="line.108"></a> +<span class="sourceLineNo">109</span> return -1;<a name="line.109"></a> +<span class="sourceLineNo">110</span> }<a name="line.110"></a> +<span class="sourceLineNo">111</span> final TableName tableName = TableName.valueOf(args[0]);<a name="line.111"></a> +<span class="sourceLineNo">112</span> try {<a name="line.112"></a> +<span class="sourceLineNo">113</span> refreshHFiles(tableName);<a name="line.113"></a> +<span class="sourceLineNo">114</span> } catch (Throwable t) {<a name="line.114"></a> +<span class="sourceLineNo">115</span> LOG.error("Refresh HFiles from table " + tableName.getNameAsString() + " failed: ", t);<a name="line.115"></a> +<span class="sourceLineNo">116</span> return -1;<a name="line.116"></a> +<span class="sourceLineNo">117</span> }<a name="line.117"></a> +<span class="sourceLineNo">118</span> return 0;<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 void main(String[] args) throws Exception {<a name="line.121"></a> +<span class="sourceLineNo">122</span> ToolRunner.run(new RefreshHFilesClient(HBaseConfiguration.create()), args);<a name="line.122"></a> +<span class="sourceLineNo">123</span> }<a name="line.123"></a> +<span class="sourceLineNo">124</span>}<a name="line.124"></a>
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b/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.RegionInTransitionStat.html index 7e9572c..801dc55 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.RegionInTransitionStat.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.RegionInTransitionStat.html @@ -139,7 +139,7 @@ <span class="sourceLineNo">131</span><a name="line.131"></a> <span class="sourceLineNo">132</span> public static final String ASSIGN_MAX_ATTEMPTS =<a name="line.132"></a> <span class="sourceLineNo">133</span> "hbase.assignment.maximum.attempts";<a name="line.133"></a> -<span class="sourceLineNo">134</span> private static final int DEFAULT_ASSIGN_MAX_ATTEMPTS = 10;<a name="line.134"></a> +<span class="sourceLineNo">134</span> private static final int DEFAULT_ASSIGN_MAX_ATTEMPTS = Integer.MAX_VALUE;<a name="line.134"></a> <span class="sourceLineNo">135</span><a name="line.135"></a> <span 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a/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html b/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html index 387eb34..9ee37c0 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html @@ -94,209 +94,219 @@ <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> @Override<a name="line.88"></a> -<span class="sourceLineNo">089</span> public void addFront(Iterator<Procedure> procedureIterator) {<a name="line.89"></a> -<span class="sourceLineNo">090</span> schedLock();<a name="line.90"></a> -<span class="sourceLineNo">091</span> try {<a name="line.91"></a> -<span class="sourceLineNo">092</span> int count = 0;<a name="line.92"></a> -<span class="sourceLineNo">093</span> while (procedureIterator.hasNext()) {<a name="line.93"></a> -<span class="sourceLineNo">094</span> Procedure procedure = procedureIterator.next();<a name="line.94"></a> -<span class="sourceLineNo">095</span> if (LOG.isTraceEnabled()) {<a name="line.95"></a> -<span class="sourceLineNo">096</span> LOG.trace("Wake " + procedure);<a name="line.96"></a> -<span class="sourceLineNo">097</span> }<a name="line.97"></a> -<span class="sourceLineNo">098</span> push(procedure, /* addFront= */ true, /* notify= */false);<a name="line.98"></a> -<span class="sourceLineNo">099</span> count++;<a name="line.99"></a> -<span class="sourceLineNo">100</span> }<a name="line.100"></a> -<span class="sourceLineNo">101</span> wakePollIfNeeded(count);<a name="line.101"></a> -<span class="sourceLineNo">102</span> } finally {<a name="line.102"></a> -<span class="sourceLineNo">103</span> schedUnlock();<a name="line.103"></a> -<span class="sourceLineNo">104</span> }<a name="line.104"></a> -<span class="sourceLineNo">105</span> }<a name="line.105"></a> -<span class="sourceLineNo">106</span><a name="line.106"></a> -<span class="sourceLineNo">107</span> @Override<a name="line.107"></a> -<span class="sourceLineNo">108</span> public void addBack(final Procedure procedure) {<a name="line.108"></a> -<span class="sourceLineNo">109</span> push(procedure, false, true);<a name="line.109"></a> +<span class="sourceLineNo">089</span> public void addFront(final Procedure procedure, boolean notify) {<a name="line.89"></a> +<span class="sourceLineNo">090</span> push(procedure, true, notify);<a name="line.90"></a> +<span class="sourceLineNo">091</span> }<a name="line.91"></a> +<span class="sourceLineNo">092</span><a name="line.92"></a> +<span class="sourceLineNo">093</span> @Override<a name="line.93"></a> +<span class="sourceLineNo">094</span> public void addFront(Iterator<Procedure> procedureIterator) {<a name="line.94"></a> +<span class="sourceLineNo">095</span> schedLock();<a name="line.95"></a> +<span class="sourceLineNo">096</span> try {<a name="line.96"></a> +<span class="sourceLineNo">097</span> int count = 0;<a name="line.97"></a> +<span class="sourceLineNo">098</span> while (procedureIterator.hasNext()) {<a name="line.98"></a> +<span class="sourceLineNo">099</span> Procedure procedure = procedureIterator.next();<a name="line.99"></a> +<span class="sourceLineNo">100</span> if (LOG.isTraceEnabled()) {<a name="line.100"></a> +<span class="sourceLineNo">101</span> LOG.trace("Wake " + procedure);<a name="line.101"></a> +<span class="sourceLineNo">102</span> }<a name="line.102"></a> +<span class="sourceLineNo">103</span> push(procedure, /* addFront= */ true, /* notify= */false);<a name="line.103"></a> +<span class="sourceLineNo">104</span> count++;<a name="line.104"></a> +<span class="sourceLineNo">105</span> }<a name="line.105"></a> +<span class="sourceLineNo">106</span> wakePollIfNeeded(count);<a name="line.106"></a> +<span class="sourceLineNo">107</span> } finally {<a name="line.107"></a> +<span class="sourceLineNo">108</span> schedUnlock();<a name="line.108"></a> +<span class="sourceLineNo">109</span> }<a name="line.109"></a> <span class="sourceLineNo">110</span> }<a name="line.110"></a> <span class="sourceLineNo">111</span><a name="line.111"></a> -<span class="sourceLineNo">112</span> protected void push(final Procedure procedure, final boolean addFront, final boolean notify) {<a name="line.112"></a> -<span class="sourceLineNo">113</span> schedLock();<a name="line.113"></a> -<span class="sourceLineNo">114</span> try {<a name="line.114"></a> -<span class="sourceLineNo">115</span> enqueue(procedure, addFront);<a name="line.115"></a> -<span class="sourceLineNo">116</span> if (notify) {<a name="line.116"></a> -<span class="sourceLineNo">117</span> schedWaitCond.signal();<a name="line.117"></a> -<span class="sourceLineNo">118</span> }<a name="line.118"></a> -<span class="sourceLineNo">119</span> } finally {<a name="line.119"></a> -<span class="sourceLineNo">120</span> schedUnlock();<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><a name="line.123"></a> -<span class="sourceLineNo">124</span> // ==========================================================================<a name="line.124"></a> -<span class="sourceLineNo">125</span> // Poll related<a name="line.125"></a> -<span class="sourceLineNo">126</span> // ==========================================================================<a name="line.126"></a> -<span class="sourceLineNo">127</span> /**<a name="line.127"></a> -<span class="sourceLineNo">128</span> * Fetch one Procedure from the queue<a name="line.128"></a> -<span class="sourceLineNo">129</span> * NOTE: this method is called with the sched lock held.<a name="line.129"></a> -<span class="sourceLineNo">130</span> * @return the Procedure to execute, or null if nothing is available.<a name="line.130"></a> -<span class="sourceLineNo">131</span> */<a name="line.131"></a> -<span class="sourceLineNo">132</span> protected abstract Procedure dequeue();<a name="line.132"></a> +<span class="sourceLineNo">112</span> @Override<a name="line.112"></a> +<span class="sourceLineNo">113</span> public void addBack(final Procedure procedure) {<a name="line.113"></a> +<span class="sourceLineNo">114</span> push(procedure, false, true);<a name="line.114"></a> +<span class="sourceLineNo">115</span> }<a name="line.115"></a> +<span class="sourceLineNo">116</span><a name="line.116"></a> +<span class="sourceLineNo">117</span> @Override<a name="line.117"></a> +<span class="sourceLineNo">118</span> public void addBack(final Procedure procedure, boolean notify) {<a name="line.118"></a> +<span class="sourceLineNo">119</span> push(procedure, false, notify);<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> protected void push(final Procedure procedure, final boolean addFront, final boolean notify) {<a name="line.122"></a> +<span class="sourceLineNo">123</span> schedLock();<a name="line.123"></a> +<span class="sourceLineNo">124</span> try {<a name="line.124"></a> +<span class="sourceLineNo">125</span> enqueue(procedure, addFront);<a name="line.125"></a> +<span class="sourceLineNo">126</span> if (notify) {<a name="line.126"></a> +<span class="sourceLineNo">127</span> schedWaitCond.signal();<a name="line.127"></a> +<span class="sourceLineNo">128</span> }<a name="line.128"></a> +<span class="sourceLineNo">129</span> } finally {<a name="line.129"></a> +<span class="sourceLineNo">130</span> schedUnlock();<a name="line.130"></a> +<span class="sourceLineNo">131</span> }<a name="line.131"></a> +<span class="sourceLineNo">132</span> }<a name="line.132"></a> <span class="sourceLineNo">133</span><a name="line.133"></a> -<span class="sourceLineNo">134</span> @Override<a name="line.134"></a> -<span class="sourceLineNo">135</span> public Procedure poll() {<a name="line.135"></a> -<span class="sourceLineNo">136</span> return poll(-1);<a name="line.136"></a> -<span class="sourceLineNo">137</span> }<a name="line.137"></a> -<span class="sourceLineNo">138</span><a name="line.138"></a> -<span class="sourceLineNo">139</span> @Override<a name="line.139"></a> -<span class="sourceLineNo">140</span> public Procedure poll(long timeout, TimeUnit unit) {<a name="line.140"></a> -<span class="sourceLineNo">141</span> return poll(unit.toNanos(timeout));<a name="line.141"></a> -<span class="sourceLineNo">142</span> }<a name="line.142"></a> +<span class="sourceLineNo">134</span> // ==========================================================================<a name="line.134"></a> +<span class="sourceLineNo">135</span> // Poll related<a name="line.135"></a> +<span class="sourceLineNo">136</span> // ==========================================================================<a name="line.136"></a> +<span class="sourceLineNo">137</span> /**<a name="line.137"></a> +<span class="sourceLineNo">138</span> * Fetch one Procedure from the queue<a name="line.138"></a> +<span class="sourceLineNo">139</span> * NOTE: this method is called with the sched lock held.<a name="line.139"></a> +<span class="sourceLineNo">140</span> * @return the Procedure to execute, or null if nothing is available.<a name="line.140"></a> +<span class="sourceLineNo">141</span> */<a name="line.141"></a> +<span class="sourceLineNo">142</span> protected abstract Procedure dequeue();<a name="line.142"></a> <span class="sourceLineNo">143</span><a name="line.143"></a> -<span class="sourceLineNo">144</span> @edu.umd.cs.findbugs.annotations.SuppressWarnings("WA_AWAIT_NOT_IN_LOOP")<a name="line.144"></a> -<span class="sourceLineNo">145</span> public Procedure poll(final long nanos) {<a name="line.145"></a> -<span class="sourceLineNo">146</span> schedLock();<a name="line.146"></a> -<span class="sourceLineNo">147</span> try {<a name="line.147"></a> -<span class="sourceLineNo">148</span> if (!running) {<a name="line.148"></a> -<span class="sourceLineNo">149</span> LOG.debug("the scheduler is not running");<a name="line.149"></a> -<span class="sourceLineNo">150</span> return null;<a name="line.150"></a> -<span class="sourceLineNo">151</span> }<a name="line.151"></a> -<span class="sourceLineNo">152</span><a name="line.152"></a> -<span class="sourceLineNo">153</span> if (!queueHasRunnables()) {<a name="line.153"></a> -<span class="sourceLineNo">154</span> // WA_AWAIT_NOT_IN_LOOP: we are not in a loop because we want the caller<a name="line.154"></a> -<span class="sourceLineNo">155</span> // to take decisions after a wake/interruption.<a name="line.155"></a> -<span class="sourceLineNo">156</span> if (nanos < 0) {<a name="line.156"></a> -<span class="sourceLineNo">157</span> schedWaitCond.await();<a name="line.157"></a> -<span class="sourceLineNo">158</span> } else {<a name="line.158"></a> -<span class="sourceLineNo">159</span> schedWaitCond.awaitNanos(nanos);<a name="line.159"></a> -<span class="sourceLineNo">160</span> }<a name="line.160"></a> -<span class="sourceLineNo">161</span> if (!queueHasRunnables()) {<a name="line.161"></a> -<span class="sourceLineNo">162</span> nullPollCalls++;<a name="line.162"></a> -<span class="sourceLineNo">163</span> return null;<a name="line.163"></a> -<span class="sourceLineNo">164</span> }<a name="line.164"></a> -<span class="sourceLineNo">165</span> }<a name="line.165"></a> -<span class="sourceLineNo">166</span> final Procedure pollResult = dequeue();<a name="line.166"></a> -<span class="sourceLineNo">167</span><a name="line.167"></a> -<span class="sourceLineNo">168</span> pollCalls++;<a name="line.168"></a> -<span class="sourceLineNo">169</span> nullPollCalls += (pollResult == null) ? 1 : 0;<a name="line.169"></a> -<span class="sourceLineNo">170</span> return pollResult;<a name="line.170"></a> -<span class="sourceLineNo">171</span> } catch (InterruptedException e) {<a name="line.171"></a> -<span class="sourceLineNo">172</span> Thread.currentThread().interrupt();<a name="line.172"></a> -<span class="sourceLineNo">173</span> nullPollCalls++;<a name="line.173"></a> -<span class="sourceLineNo">174</span> return null;<a name="line.174"></a> -<span class="sourceLineNo">175</span> } finally {<a name="line.175"></a> -<span class="sourceLineNo">176</span> schedUnlock();<a name="line.176"></a> -<span class="sourceLineNo">177</span> }<a name="line.177"></a> -<span class="sourceLineNo">178</span> }<a name="line.178"></a> -<span class="sourceLineNo">179</span><a name="line.179"></a> -<span class="sourceLineNo">180</span> // ==========================================================================<a name="line.180"></a> -<span class="sourceLineNo">181</span> // Utils<a name="line.181"></a> -<span class="sourceLineNo">182</span> // ==========================================================================<a name="line.182"></a> -<span class="sourceLineNo">183</span> /**<a name="line.183"></a> -<span class="sourceLineNo">184</span> * Returns the number of elements in this queue.<a name="line.184"></a> -<span class="sourceLineNo">185</span> * NOTE: this method is called with the sched lock held.<a name="line.185"></a> -<span class="sourceLineNo">186</span> * @return the number of elements in this queue.<a name="line.186"></a> -<span class="sourceLineNo">187</span> */<a name="line.187"></a> -<span class="sourceLineNo">188</span> protected abstract int queueSize();<a name="line.188"></a> +<span class="sourceLineNo">144</span> @Override<a name="line.144"></a> +<span class="sourceLineNo">145</span> public Procedure poll() {<a name="line.145"></a> +<span class="sourceLineNo">146</span> return poll(-1);<a name="line.146"></a> +<span class="sourceLineNo">147</span> }<a name="line.147"></a> +<span class="sourceLineNo">148</span><a name="line.148"></a> +<span class="sourceLineNo">149</span> @Override<a name="line.149"></a> +<span class="sourceLineNo">150</span> public Procedure poll(long timeout, TimeUnit unit) {<a name="line.150"></a> +<span class="sourceLineNo">151</span> return poll(unit.toNanos(timeout));<a name="line.151"></a> +<span class="sourceLineNo">152</span> }<a name="line.152"></a> +<span class="sourceLineNo">153</span><a name="line.153"></a> +<span class="sourceLineNo">154</span> @edu.umd.cs.findbugs.annotations.SuppressWarnings("WA_AWAIT_NOT_IN_LOOP")<a name="line.154"></a> +<span class="sourceLineNo">155</span> public Procedure poll(final long nanos) {<a name="line.155"></a> +<span class="sourceLineNo">156</span> schedLock();<a name="line.156"></a> +<span class="sourceLineNo">157</span> try {<a name="line.157"></a> +<span class="sourceLineNo">158</span> if (!running) {<a name="line.158"></a> +<span class="sourceLineNo">159</span> LOG.debug("the scheduler is not running");<a name="line.159"></a> +<span class="sourceLineNo">160</span> return null;<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> if (!queueHasRunnables()) {<a name="line.163"></a> +<span class="sourceLineNo">164</span> // WA_AWAIT_NOT_IN_LOOP: we are not in a loop because we want the caller<a name="line.164"></a> +<span class="sourceLineNo">165</span> // to take decisions after a wake/interruption.<a name="line.165"></a> +<span class="sourceLineNo">166</span> if (nanos < 0) {<a name="line.166"></a> +<span class="sourceLineNo">167</span> schedWaitCond.await();<a name="line.167"></a> +<span class="sourceLineNo">168</span> } else {<a name="line.168"></a> +<span class="sourceLineNo">169</span> schedWaitCond.awaitNanos(nanos);<a name="line.169"></a> +<span class="sourceLineNo">170</span> }<a name="line.170"></a> +<span class="sourceLineNo">171</span> if (!queueHasRunnables()) {<a name="line.171"></a> +<span class="sourceLineNo">172</span> nullPollCalls++;<a name="line.172"></a> +<span class="sourceLineNo">173</span> return null;<a name="line.173"></a> +<span class="sourceLineNo">174</span> }<a name="line.174"></a> +<span class="sourceLineNo">175</span> }<a name="line.175"></a> +<span class="sourceLineNo">176</span> final Procedure pollResult = dequeue();<a name="line.176"></a> +<span class="sourceLineNo">177</span><a name="line.177"></a> +<span class="sourceLineNo">178</span> pollCalls++;<a name="line.178"></a> +<span class="sourceLineNo">179</span> nullPollCalls += (pollResult == null) ? 1 : 0;<a name="line.179"></a> +<span class="sourceLineNo">180</span> return pollResult;<a name="line.180"></a> +<span class="sourceLineNo">181</span> } catch (InterruptedException e) {<a name="line.181"></a> +<span class="sourceLineNo">182</span> Thread.currentThread().interrupt();<a name="line.182"></a> +<span class="sourceLineNo">183</span> nullPollCalls++;<a name="line.183"></a> +<span class="sourceLineNo">184</span> return null;<a name="line.184"></a> +<span class="sourceLineNo">185</span> } finally {<a name="line.185"></a> +<span class="sourceLineNo">186</span> schedUnlock();<a name="line.186"></a> +<span class="sourceLineNo">187</span> }<a name="line.187"></a> +<span class="sourceLineNo">188</span> }<a name="line.188"></a> <span class="sourceLineNo">189</span><a name="line.189"></a> -<span class="sourceLineNo">190</span> /**<a name="line.190"></a> -<span class="sourceLineNo">191</span> * Returns true if there are procedures available to process.<a name="line.191"></a> -<span class="sourceLineNo">192</span> * NOTE: this method is called with the sched lock held.<a name="line.192"></a> -<span class="sourceLineNo">193</span> * @return true if there are procedures available to process, otherwise false.<a name="line.193"></a> -<span class="sourceLineNo">194</span> */<a name="line.194"></a> -<span class="sourceLineNo">195</span> protected abstract boolean queueHasRunnables();<a name="line.195"></a> -<span class="sourceLineNo">196</span><a name="line.196"></a> -<span class="sourceLineNo">197</span> @Override<a name="line.197"></a> -<span class="sourceLineNo">198</span> public int size() {<a name="line.198"></a> -<span class="sourceLineNo">199</span> schedLock();<a name="line.199"></a> -<span class="sourceLineNo">200</span> try {<a name="line.200"></a> -<span class="sourceLineNo">201</span> return queueSize();<a name="line.201"></a> -<span class="sourceLineNo">202</span> } finally {<a name="line.202"></a> -<span class="sourceLineNo">203</span> schedUnlock();<a name="line.203"></a> -<span class="sourceLineNo">204</span> }<a name="line.204"></a> -<span class="sourceLineNo">205</span> }<a name="line.205"></a> +<span class="sourceLineNo">190</span> // ==========================================================================<a name="line.190"></a> +<span class="sourceLineNo">191</span> // Utils<a name="line.191"></a> +<span class="sourceLineNo">192</span> // ==========================================================================<a name="line.192"></a> +<span class="sourceLineNo">193</span> /**<a name="line.193"></a> +<span class="sourceLineNo">194</span> * Returns the number of elements in this queue.<a name="line.194"></a> +<span class="sourceLineNo">195</span> * NOTE: this method is called with the sched lock held.<a name="line.195"></a> +<span class="sourceLineNo">196</span> * @return the number of elements in this queue.<a name="line.196"></a> +<span class="sourceLineNo">197</span> */<a name="line.197"></a> +<span class="sourceLineNo">198</span> protected abstract int queueSize();<a name="line.198"></a> +<span class="sourceLineNo">199</span><a name="line.199"></a> +<span class="sourceLineNo">200</span> /**<a name="line.200"></a> +<span class="sourceLineNo">201</span> * Returns true if there are procedures available to process.<a name="line.201"></a> +<span class="sourceLineNo">202</span> * NOTE: this method is called with the sched lock held.<a name="line.202"></a> +<span class="sourceLineNo">203</span> * @return true if there are procedures available to process, otherwise false.<a name="line.203"></a> +<span class="sourceLineNo">204</span> */<a name="line.204"></a> +<span class="sourceLineNo">205</span> protected abstract boolean queueHasRunnables();<a name="line.205"></a> <span class="sourceLineNo">206</span><a name="line.206"></a> <span class="sourceLineNo">207</span> @Override<a name="line.207"></a> -<span class="sourceLineNo">208</span> public boolean hasRunnables() {<a name="line.208"></a> +<span class="sourceLineNo">208</span> public int size() {<a name="line.208"></a> <span class="sourceLineNo">209</span> schedLock();<a name="line.209"></a> <span class="sourceLineNo">210</span> try {<a name="line.210"></a> -<span class="sourceLineNo">211</span> return queueHasRunnables();<a name="line.211"></a> +<span class="sourceLineNo">211</span> return queueSize();<a name="line.211"></a> <span class="sourceLineNo">212</span> } finally {<a name="line.212"></a> <span class="sourceLineNo">213</span> schedUnlock();<a name="line.213"></a> <span class="sourceLineNo">214</span> }<a name="line.214"></a> <span class="sourceLineNo">215</span> }<a name="line.215"></a> <span class="sourceLineNo">216</span><a name="line.216"></a> -<span class="sourceLineNo">217</span> // ============================================================================<a name="line.217"></a> -<span class="sourceLineNo">218</span> // TODO: Metrics<a name="line.218"></a> -<span class="sourceLineNo">219</span> // ============================================================================<a name="line.219"></a> -<span class="sourceLineNo">220</span> public long getPollCalls() {<a name="line.220"></a> -<span class="sourceLineNo">221</span> return pollCalls;<a name="line.221"></a> -<span class="sourceLineNo">222</span> }<a name="line.222"></a> -<span class="sourceLineNo">223</span><a name="line.223"></a> -<span class="sourceLineNo">224</span> public long getNullPollCalls() {<a name="line.224"></a> -<span class="sourceLineNo">225</span> return nullPollCalls;<a name="line.225"></a> -<span class="sourceLineNo">226</span> }<a name="line.226"></a> -<span class="sourceLineNo">227</span><a name="line.227"></a> -<span class="sourceLineNo">228</span> // ==========================================================================<a name="line.228"></a> -<span class="sourceLineNo">229</span> // Procedure Events<a name="line.229"></a> -<span class="sourceLineNo">230</span> // ==========================================================================<a name="line.230"></a> -<span class="sourceLineNo">231</span><a name="line.231"></a> -<span class="sourceLineNo">232</span> /**<a name="line.232"></a> -<span class="sourceLineNo">233</span> * Wake up all of the given events.<a name="line.233"></a> -<span class="sourceLineNo">234</span> * Note that we first take scheduler lock and then wakeInternal() synchronizes on the event.<a name="line.234"></a> -<span class="sourceLineNo">235</span> * Access should remain package-private. Use ProcedureEvent class to wake/suspend events.<a name="line.235"></a> -<span class="sourceLineNo">236</span> * @param events the list of events to wake<a name="line.236"></a> -<span class="sourceLineNo">237</span> */<a name="line.237"></a> -<span class="sourceLineNo">238</span> void wakeEvents(ProcedureEvent[] events) {<a name="line.238"></a> -<span class="sourceLineNo">239</span> schedLock();<a name="line.239"></a> -<span class="sourceLineNo">240</span> try {<a name="line.240"></a> -<span class="sourceLineNo">241</span> for (ProcedureEvent event : events) {<a name="line.241"></a> -<span class="sourceLineNo">242</span> if (event == null) {<a name="line.242"></a> -<span class="sourceLineNo">243</span> continue;<a name="line.243"></a> -<span class="sourceLineNo">244</span> }<a name="line.244"></a> -<span class="sourceLineNo">245</span> event.wakeInternal(this);<a name="line.245"></a> -<span class="sourceLineNo">246</span> }<a name="line.246"></a> -<span class="sourceLineNo">247</span> } finally {<a name="line.247"></a> -<span class="sourceLineNo">248</span> schedUnlock();<a name="line.248"></a> -<span class="sourceLineNo">249</span> }<a name="line.249"></a> -<span class="sourceLineNo">250</span> }<a name="line.250"></a> -<span class="sourceLineNo">251</span><a name="line.251"></a> -<span class="sourceLineNo">252</span> /**<a name="line.252"></a> -<span class="sourceLineNo">253</span> * Wakes up given waiting procedures by pushing them back into scheduler queues.<a name="line.253"></a> -<span class="sourceLineNo">254</span> * @return size of given {@code waitQueue}.<a name="line.254"></a> -<span class="sourceLineNo">255</span> */<a name="line.255"></a> -<span class="sourceLineNo">256</span> protected int wakeWaitingProcedures(LockAndQueue lockAndQueue) {<a name="line.256"></a> -<span class="sourceLineNo">257</span> return lockAndQueue.wakeWaitingProcedures(this);<a name="line.257"></a> -<span class="sourceLineNo">258</span> }<a name="line.258"></a> -<span class="sourceLineNo">259</span><a name="line.259"></a> -<span class="sourceLineNo">260</span> protected void waitProcedure(LockAndQueue lockAndQueue, final Procedure proc) {<a name="line.260"></a> -<span class="sourceLineNo">261</span> lockAndQueue.addLast(proc);<a name="line.261"></a> -<span class="sourceLineNo">262</span> }<a name="line.262"></a> -<span class="sourceLineNo">263</span><a name="line.263"></a> -<span class="sourceLineNo">264</span> protected void wakeProcedure(final Procedure procedure) {<a name="line.264"></a> -<span class="sourceLineNo">265</span> LOG.trace("Wake {}", procedure);<a name="line.265"></a> -<span class="sourceLineNo">266</span> push(procedure, /* addFront= */ true, /* notify= */false);<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">217</span> @Override<a name="line.217"></a> +<span class="sourceLineNo">218</span> public boolean hasRunnables() {<a name="line.218"></a> +<span class="sourceLineNo">219</span> schedLock();<a name="line.219"></a> +<span class="sourceLineNo">220</span> try {<a name="line.220"></a> +<span class="sourceLineNo">221</span> return queueHasRunnables();<a name="line.221"></a> +<span class="sourceLineNo">222</span> } finally {<a name="line.222"></a> +<span class="sourceLineNo">223</span> schedUnlock();<a name="line.223"></a> +<span class="sourceLineNo">224</span> }<a name="line.224"></a> +<span class="sourceLineNo">225</span> }<a name="line.225"></a> +<span class="sourceLineNo">226</span><a name="line.226"></a> +<span class="sourceLineNo">227</span> // ============================================================================<a name="line.227"></a> +<span class="sourceLineNo">228</span> // TODO: Metrics<a name="line.228"></a> +<span class="sourceLineNo">229</span> // ============================================================================<a name="line.229"></a> +<span class="sourceLineNo">230</span> public long getPollCalls() {<a name="line.230"></a> +<span class="sourceLineNo">231</span> return pollCalls;<a name="line.231"></a> +<span class="sourceLineNo">232</span> }<a name="line.232"></a> +<span class="sourceLineNo">233</span><a name="line.233"></a> +<span class="sourceLineNo">234</span> public long getNullPollCalls() {<a name="line.234"></a> +<span class="sourceLineNo">235</span> return nullPollCalls;<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> // Procedure Events<a name="line.239"></a> +<span class="sourceLineNo">240</span> // ==========================================================================<a name="line.240"></a> +<span class="sourceLineNo">241</span><a name="line.241"></a> +<span class="sourceLineNo">242</span> /**<a name="line.242"></a> +<span class="sourceLineNo">243</span> * Wake up all of the given events.<a name="line.243"></a> +<span class="sourceLineNo">244</span> * Note that we first take scheduler lock and then wakeInternal() synchronizes on the event.<a name="line.244"></a> +<span class="sourceLineNo">245</span> * Access should remain package-private. Use ProcedureEvent class to wake/suspend events.<a name="line.245"></a> +<span class="sourceLineNo">246</span> * @param events the list of events to wake<a name="line.246"></a> +<span class="sourceLineNo">247</span> */<a name="line.247"></a> +<span class="sourceLineNo">248</span> void wakeEvents(ProcedureEvent[] events) {<a name="line.248"></a> +<span class="sourceLineNo">249</span> schedLock();<a name="line.249"></a> +<span class="sourceLineNo">250</span> try {<a name="line.250"></a> +<span class="sourceLineNo">251</span> for (ProcedureEvent event : events) {<a name="line.251"></a> +<span class="sourceLineNo">252</span> if (event == null) {<a name="line.252"></a> +<span class="sourceLineNo">253</span> continue;<a name="line.253"></a> +<span class="sourceLineNo">254</span> }<a name="line.254"></a> +<span class="sourceLineNo">255</span> event.wakeInternal(this);<a name="line.255"></a> +<span class="sourceLineNo">256</span> }<a name="line.256"></a> +<span class="sourceLineNo">257</span> } finally {<a name="line.257"></a> +<span class="sourceLineNo">258</span> schedUnlock();<a name="line.258"></a> +<span class="sourceLineNo">259</span> }<a name="line.259"></a> +<span class="sourceLineNo">260</span> }<a name="line.260"></a> +<span class="sourceLineNo">261</span><a name="line.261"></a> +<span class="sourceLineNo">262</span> /**<a name="line.262"></a> +<span class="sourceLineNo">263</span> * Wakes up given waiting procedures by pushing them back into scheduler queues.<a name="line.263"></a> +<span class="sourceLineNo">264</span> * @return size of given {@code waitQueue}.<a name="line.264"></a> +<span class="sourceLineNo">265</span> */<a name="line.265"></a> +<span class="sourceLineNo">266</span> protected int wakeWaitingProcedures(LockAndQueue lockAndQueue) {<a name="line.266"></a> +<span class="sourceLineNo">267</span> return lockAndQueue.wakeWaitingProcedures(this);<a name="line.267"></a> +<span class="sourceLineNo">268</span> }<a name="line.268"></a> <span class="sourceLineNo">269</span><a name="line.269"></a> -<span class="sourceLineNo">270</span> // ==========================================================================<a name="line.270"></a> -<span class="sourceLineNo">271</span> // Internal helpers<a name="line.271"></a> -<span class="sourceLineNo">272</span> // ==========================================================================<a name="line.272"></a> -<span class="sourceLineNo">273</span> protected void schedLock() {<a name="line.273"></a> -<span class="sourceLineNo">274</span> schedulerLock.lock();<a name="line.274"></a> -<span class="sourceLineNo">275</span> }<a name="line.275"></a> -<span class="sourceLineNo">276</span><a name="line.276"></a> -<span class="sourceLineNo">277</span> protected void schedUnlock() {<a name="line.277"></a> -<span class="sourceLineNo">278</span> schedulerLock.unlock();<a name="line.278"></a> -<span class="sourceLineNo">279</span> }<a name="line.279"></a> -<span class="sourceLineNo">280</span><a name="line.280"></a> -<span class="sourceLineNo">281</span> protected void wakePollIfNeeded(final int waitingCount) {<a name="line.281"></a> -<span class="sourceLineNo">282</span> if (waitingCount <= 0) {<a name="line.282"></a> -<span class="sourceLineNo">283</span> return;<a name="line.283"></a> -<span class="sourceLineNo">284</span> }<a name="line.284"></a> -<span class="sourceLineNo">285</span> if (waitingCount == 1) {<a name="line.285"></a> -<span class="sourceLineNo">286</span> schedWaitCond.signal();<a name="line.286"></a> -<span class="sourceLineNo">287</span> } else {<a name="line.287"></a> -<span class="sourceLineNo">288</span> schedWaitCond.signalAll();<a name="line.288"></a> -<span class="sourceLineNo">289</span> }<a name="line.289"></a> -<span class="sourceLineNo">290</span> }<a name="line.290"></a> -<span class="sourceLineNo">291</span>}<a name="line.291"></a> +<span class="sourceLineNo">270</span> protected void waitProcedure(LockAndQueue lockAndQueue, final Procedure proc) {<a name="line.270"></a> +<span class="sourceLineNo">271</span> lockAndQueue.addLast(proc);<a name="line.271"></a> +<span class="sourceLineNo">272</span> }<a name="line.272"></a> +<span class="sourceLineNo">273</span><a name="line.273"></a> +<span class="sourceLineNo">274</span> protected void wakeProcedure(final Procedure procedure) {<a name="line.274"></a> +<span class="sourceLineNo">275</span> LOG.trace("Wake {}", procedure);<a name="line.275"></a> +<span class="sourceLineNo">276</span> push(procedure, /* addFront= */ true, /* notify= */false);<a name="line.276"></a> +<span class="sourceLineNo">277</span> }<a name="line.277"></a> +<span class="sourceLineNo">278</span><a name="line.278"></a> +<span class="sourceLineNo">279</span><a name="line.279"></a> +<span class="sourceLineNo">280</span> // ==========================================================================<a name="line.280"></a> +<span class="sourceLineNo">281</span> // Internal helpers<a name="line.281"></a> +<span class="sourceLineNo">282</span> // ==========================================================================<a name="line.282"></a> +<span class="sourceLineNo">283</span> protected void schedLock() {<a name="line.283"></a> +<span class="sourceLineNo">284</span> schedulerLock.lock();<a name="line.284"></a> +<span class="sourceLineNo">285</span> }<a name="line.285"></a> +<span class="sourceLineNo">286</span><a name="line.286"></a> +<span class="sourceLineNo">287</span> protected void schedUnlock() {<a name="line.287"></a> +<span class="sourceLineNo">288</span> schedulerLock.unlock();<a name="line.288"></a> +<span class="sourceLineNo">289</span> }<a name="line.289"></a> +<span class="sourceLineNo">290</span><a name="line.290"></a> +<span class="sourceLineNo">291</span> protected void wakePollIfNeeded(final int waitingCount) {<a name="line.291"></a> +<span class="sourceLineNo">292</span> if (waitingCount <= 0) {<a name="line.292"></a> +<span class="sourceLineNo">293</span> return;<a name="line.293"></a> +<span class="sourceLineNo">294</span> }<a name="line.294"></a> +<span class="sourceLineNo">295</span> if (waitingCount == 1) {<a name="line.295"></a> +<span class="sourceLineNo">296</span> schedWaitCond.signal();<a name="line.296"></a> +<span class="sourceLineNo">297</span> } else {<a name="line.297"></a> +<span class="sourceLineNo">298</span> schedWaitCond.signalAll();<a name="line.298"></a> +<span class="sourceLineNo">299</span> }<a name="line.299"></a> +<span class="sourceLineNo">300</span> }<a name="line.300"></a> +<span class="sourceLineNo">301</span>}<a name="line.301"></a> http://git-wip-us.apache.org/repos/asf/hbase-site/blob/5f45c993/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/LockAndQueue.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/LockAndQueue.html b/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/LockAndQueue.html index 6df87bb..1c77e4e 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/LockAndQueue.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/LockAndQueue.html @@ -81,123 +81,124 @@ <span class="sourceLineNo">073</span><a name="line.73"></a> <span class="sourceLineNo">074</span> @Override<a name="line.74"></a> <span class="sourceLineNo">075</span> public boolean hasParentLock(Procedure<?> proc) {<a name="line.75"></a> -<span class="sourceLineNo">076</span> // TODO: need to check all the ancestors<a name="line.76"></a> -<span class="sourceLineNo">077</span> return proc.hasParent() &&<a name="line.77"></a> -<span class="sourceLineNo">078</span> (isLockOwner(proc.getParentProcId()) || isLockOwner(proc.getRootProcId()));<a name="line.78"></a> -<span class="sourceLineNo">079</span> }<a name="line.79"></a> -<span class="sourceLineNo">080</span><a name="line.80"></a> -<span class="sourceLineNo">081</span> @Override<a name="line.81"></a> -<span class="sourceLineNo">082</span> public boolean hasLockAccess(Procedure<?> proc) {<a name="line.82"></a> -<span class="sourceLineNo">083</span> return isLockOwner(proc.getProcId()) || hasParentLock(proc);<a name="line.83"></a> -<span class="sourceLineNo">084</span> }<a name="line.84"></a> -<span class="sourceLineNo">085</span><a name="line.85"></a> -<span class="sourceLineNo">086</span> @Override<a name="line.86"></a> -<span class="sourceLineNo">087</span> public Procedure<?> getExclusiveLockOwnerProcedure() {<a name="line.87"></a> -<span class="sourceLineNo">088</span> return exclusiveLockOwnerProcedure;<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> @Override<a name="line.91"></a> -<span class="sourceLineNo">092</span> public long getExclusiveLockProcIdOwner() {<a name="line.92"></a> -<span class="sourceLineNo">093</span> if (exclusiveLockOwnerProcedure == null) {<a name="line.93"></a> -<span class="sourceLineNo">094</span> return Long.MIN_VALUE;<a name="line.94"></a> -<span class="sourceLineNo">095</span> } else {<a name="line.95"></a> -<span class="sourceLineNo">096</span> return exclusiveLockOwnerProcedure.getProcId();<a name="line.96"></a> -<span class="sourceLineNo">097</span> }<a name="line.97"></a> -<span class="sourceLineNo">098</span> }<a name="line.98"></a> -<span class="sourceLineNo">099</span><a name="line.99"></a> -<span class="sourceLineNo">100</span> @Override<a name="line.100"></a> -<span class="sourceLineNo">101</span> public int getSharedLockCount() {<a name="line.101"></a> -<span class="sourceLineNo">102</span> return sharedLock;<a name="line.102"></a> -<span class="sourceLineNo">103</span> }<a name="line.103"></a> -<span class="sourceLineNo">104</span><a name="line.104"></a> -<span class="sourceLineNo">105</span> // ======================================================================<a name="line.105"></a> -<span class="sourceLineNo">106</span> // try/release Shared/Exclusive lock<a name="line.106"></a> -<span class="sourceLineNo">107</span> // ======================================================================<a name="line.107"></a> -<span class="sourceLineNo">108</span><a name="line.108"></a> -<span class="sourceLineNo">109</span> /**<a name="line.109"></a> -<span class="sourceLineNo">110</span> * @return whether we have succesfully acquired the shared lock.<a name="line.110"></a> -<span class="sourceLineNo">111</span> */<a name="line.111"></a> -<span class="sourceLineNo">112</span> public boolean trySharedLock(Procedure<?> proc) {<a name="line.112"></a> -<span class="sourceLineNo">113</span> if (hasExclusiveLock() && !hasLockAccess(proc)) {<a name="line.113"></a> -<span class="sourceLineNo">114</span> return false;<a name="line.114"></a> -<span class="sourceLineNo">115</span> }<a name="line.115"></a> -<span class="sourceLineNo">116</span> // If no one holds the xlock, then we are free to hold the sharedLock<a name="line.116"></a> -<span class="sourceLineNo">117</span> // If the parent proc or we have already held the xlock, then we return true here as<a name="line.117"></a> -<span class="sourceLineNo">118</span> // xlock is more powerful then shared lock.<a name="line.118"></a> -<span class="sourceLineNo">119</span> sharedLock++;<a name="line.119"></a> -<span class="sourceLineNo">120</span> return true;<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> /**<a name="line.123"></a> -<span class="sourceLineNo">124</span> * @return whether we should wake the procedures waiting on the lock here.<a name="line.124"></a> -<span class="sourceLineNo">125</span> */<a name="line.125"></a> -<span class="sourceLineNo">126</span> public boolean releaseSharedLock() {<a name="line.126"></a> -<span class="sourceLineNo">127</span> // hasExclusiveLock could be true, it usually means we acquire shared lock while we or our<a name="line.127"></a> -<span class="sourceLineNo">128</span> // parent have held the xlock. And since there is still an exclusive lock, we do not need to<a name="line.128"></a> -<span class="sourceLineNo">129</span> // wake any procedures.<a name="line.129"></a> -<span class="sourceLineNo">130</span> return --sharedLock == 0 && !hasExclusiveLock();<a name="line.130"></a> -<span class="sourceLineNo">131</span> }<a name="line.131"></a> -<span class="sourceLineNo">132</span><a name="line.132"></a> -<span class="sourceLineNo">133</span> public boolean tryExclusiveLock(Procedure<?> proc) {<a name="line.133"></a> -<span class="sourceLineNo">134</span> if (isLocked()) {<a name="line.134"></a> -<span class="sourceLineNo">135</span> return hasLockAccess(proc);<a name="line.135"></a> -<span class="sourceLineNo">136</span> }<a name="line.136"></a> -<span class="sourceLineNo">137</span> exclusiveLockOwnerProcedure = proc;<a name="line.137"></a> -<span class="sourceLineNo">138</span> return true;<a name="line.138"></a> -<span class="sourceLineNo">139</span> }<a name="line.139"></a> -<span class="sourceLineNo">140</span><a name="line.140"></a> -<span class="sourceLineNo">141</span> /**<a name="line.141"></a> -<span class="sourceLineNo">142</span> * @return whether we should wake the procedures waiting on the lock here.<a name="line.142"></a> -<span class="sourceLineNo">143</span> */<a name="line.143"></a> -<span class="sourceLineNo">144</span> public boolean releaseExclusiveLock(Procedure<?> proc) {<a name="line.144"></a> -<span class="sourceLineNo">145</span> if (!isLockOwner(proc.getProcId())) {<a name="line.145"></a> -<span class="sourceLineNo">146</span> // We are not the lock owner, it is probably inherited from the parent procedures.<a name="line.146"></a> -<span class="sourceLineNo">147</span> return false;<a name="line.147"></a> -<span class="sourceLineNo">148</span> }<a name="line.148"></a> -<span class="sourceLineNo">149</span> exclusiveLockOwnerProcedure = null;<a name="line.149"></a> -<span class="sourceLineNo">150</span> // This maybe a bit strange so let me explain. We allow acquiring shared lock while the parent<a name="line.150"></a> -<span class="sourceLineNo">151</span> // proc or we have already held the xlock, and also allow releasing the locks in any order, so<a name="line.151"></a> -<span class="sourceLineNo">152</span> // it could happen that the xlock is released but there are still some procs holding the shared<a name="line.152"></a> -<span class="sourceLineNo">153</span> // lock.<a name="line.153"></a> -<span class="sourceLineNo">154</span> // In HBase, this could happen when a proc which holdLock is false and schedules sub procs which<a name="line.154"></a> -<span class="sourceLineNo">155</span> // acquire the shared lock on the same lock. This is because we will schedule the sub proces<a name="line.155"></a> -<span class="sourceLineNo">156</span> // before releasing the lock, so the sub procs could call acquire lock before we releasing the<a name="line.156"></a> -<span class="sourceLineNo">157</span> // xlock.<a name="line.157"></a> -<span class="sourceLineNo">158</span> return sharedLock == 0;<a name="line.158"></a> -<span class="sourceLineNo">159</span> }<a name="line.159"></a> -<span class="sourceLineNo">160</span><a name="line.160"></a> -<span class="sourceLineNo">161</span> public boolean isWaitingQueueEmpty() {<a name="line.161"></a> -<span class="sourceLineNo">162</span> return queue.isEmpty();<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> public Procedure<?> removeFirst() {<a name="line.165"></a> -<span class="sourceLineNo">166</span> return queue.removeFirst();<a name="line.166"></a> -<span class="sourceLineNo">167</span> }<a name="line.167"></a> -<span class="sourceLineNo">168</span><a name="line.168"></a> -<span class="sourceLineNo">169</span> public void addLast(Procedure<?> proc) {<a name="line.169"></a> -<span class="sourceLineNo">170</span> queue.addLast(proc);<a name="line.170"></a> -<span class="sourceLineNo">171</span> }<a name="line.171"></a> -<span class="sourceLineNo">172</span><a name="line.172"></a> -<span class="sourceLineNo">173</span> public int wakeWaitingProcedures(ProcedureScheduler scheduler) {<a name="line.173"></a> -<span class="sourceLineNo">174</span> int count = queue.size();<a name="line.174"></a> -<span class="sourceLineNo">175</span> // wakeProcedure adds to the front of queue, so we start from last in the waitQueue' queue, so<a name="line.175"></a> -<span class="sourceLineNo">176</span> // that the procedure which was added first goes in the front for the scheduler queue.<a name="line.176"></a> -<span class="sourceLineNo">177</span> scheduler.addFront(queue.descendingIterator());<a name="line.177"></a> -<span class="sourceLineNo">178</span> queue.clear();<a name="line.178"></a> -<span class="sourceLineNo">179</span> return count;<a name="line.179"></a> -<span class="sourceLineNo">180</span> }<a name="line.180"></a> -<span class="sourceLineNo">181</span><a name="line.181"></a> -<span class="sourceLineNo">182</span> @SuppressWarnings("rawtypes")<a name="line.182"></a> -<span class="sourceLineNo">183</span> public Stream<Procedure> filterWaitingQueue(Predicate<Procedure> predicate) {<a name="line.183"></a> -<span class="sourceLineNo">184</span> return queue.stream().filter(predicate);<a name="line.184"></a> -<span class="sourceLineNo">185</span> }<a name="line.185"></a> -<span class="sourceLineNo">186</span><a name="line.186"></a> -<span class="sourceLineNo">187</span> @Override<a name="line.187"></a> -<span class="sourceLineNo">188</span> public String toString() {<a name="line.188"></a> -<span class="sourceLineNo">189</span> return "exclusiveLockOwner=" + (hasExclusiveLock() ? getExclusiveLockProcIdOwner() : "NONE") +<a name="line.189"></a> -<span class="sourceLineNo">190</span> ", sharedLockCount=" + getSharedLockCount() + ", waitingProcCount=" + queue.size();<a name="line.190"></a> -<span class="sourceLineNo">191</span> }<a name="line.191"></a> -<span class="sourceLineNo">192</span>}<a name="line.192"></a> +<span class="sourceLineNo">076</span> // TODO: need to check all the ancestors. need to passed in the procedures<a name="line.76"></a> +<span class="sourceLineNo">077</span> // to find the ancestors.<a name="line.77"></a> +<span class="sourceLineNo">078</span> return proc.hasParent() &&<a name="line.78"></a> +<span class="sourceLineNo">079</span> (isLockOwner(proc.getParentProcId()) || isLockOwner(proc.getRootProcId()));<a name="line.79"></a> +<span class="sourceLineNo">080</span> }<a name="line.80"></a> +<span class="sourceLineNo">081</span><a name="line.81"></a> +<span class="sourceLineNo">082</span> @Override<a name="line.82"></a> +<span class="sourceLineNo">083</span> public boolean hasLockAccess(Procedure<?> proc) {<a name="line.83"></a> +<span class="sourceLineNo">084</span> return isLockOwner(proc.getProcId()) || hasParentLock(proc);<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> @Override<a name="line.87"></a> +<span class="sourceLineNo">088</span> public Procedure<?> getExclusiveLockOwnerProcedure() {<a name="line.88"></a> +<span class="sourceLineNo">089</span> return exclusiveLockOwnerProcedure;<a name="line.89"></a> +<span class="sourceLineNo">090</span> }<a name="line.90"></a> +<span class="sourceLineNo">091</span><a name="line.91"></a> +<span class="sourceLineNo">092</span> @Override<a name="line.92"></a> +<span class="sourceLineNo">093</span> public long getExclusiveLockProcIdOwner() {<a name="line.93"></a> +<span class="sourceLineNo">094</span> if (exclusiveLockOwnerProcedure == null) {<a name="line.94"></a> +<span class="sourceLineNo">095</span> return Long.MIN_VALUE;<a name="line.95"></a> +<span class="sourceLineNo">096</span> } else {<a name="line.96"></a> +<span class="sourceLineNo">097</span> return exclusiveLockOwnerProcedure.getProcId();<a name="line.97"></a> +<span class="sourceLineNo">098</span> }<a name="line.98"></a> +<span class="sourceLineNo">099</span> }<a name="line.99"></a> +<span class="sourceLineNo">100</span><a name="line.100"></a> +<span class="sourceLineNo">101</span> @Override<a name="line.101"></a> +<span class="sourceLineNo">102</span> public int getSharedLockCount() {<a name="line.102"></a> +<span class="sourceLineNo">103</span> return sharedLock;<a name="line.103"></a> +<span class="sourceLineNo">104</span> }<a name="line.104"></a> +<span class="sourceLineNo">105</span><a name="line.105"></a> +<span class="sourceLineNo">106</span> // ======================================================================<a name="line.106"></a> +<span class="sourceLineNo">107</span> // try/release Shared/Exclusive lock<a name="line.107"></a> +<span class="sourceLineNo">108</span> // ======================================================================<a name="line.108"></a> +<span class="sourceLineNo">109</span><a name="line.109"></a> +<span class="sourceLineNo">110</span> /**<a name="line.110"></a> +<span class="sourceLineNo">111</span> * @return whether we have succesfully acquired the shared lock.<a name="line.111"></a> +<span class="sourceLineNo">112</span> */<a name="line.112"></a> +<span class="sourceLineNo">113</span> public boolean trySharedLock(Procedure<?> proc) {<a name="line.113"></a> +<span class="sourceLineNo">114</span> if (hasExclusiveLock() && !hasLockAccess(proc)) {<a name="line.114"></a> +<span class="sourceLineNo">115</span> return false;<a name="line.115"></a> +<span class="sourceLineNo">116</span> }<a name="line.116"></a> +<span class="sourceLineNo">117</span> // If no one holds the xlock, then we are free to hold the sharedLock<a name="line.117"></a> +<span class="sourceLineNo">118</span> // If the parent proc or we have already held the xlock, then we return true here as<a name="line.118"></a> +<span class="sourceLineNo">119</span> // xlock is more powerful then shared lock.<a name="line.119"></a> +<span class="sourceLineNo">120</span> sharedLock++;<a name="line.120"></a> +<span class="sourceLineNo">121</span> return true;<a name="line.121"></a> +<span class="sourceLineNo">122</span> }<a name="line.122"></a> +<span class="sourceLineNo">123</span><a name="line.123"></a> +<span class="sourceLineNo">124</span> /**<a name="line.124"></a> +<span class="sourceLineNo">125</span> * @return whether we should wake the procedures waiting on the lock here.<a name="line.125"></a> +<span class="sourceLineNo">126</span> */<a name="line.126"></a> +<span class="sourceLineNo">127</span> public boolean releaseSharedLock() {<a name="line.127"></a> +<span class="sourceLineNo">128</span> // hasExclusiveLock could be true, it usually means we acquire shared lock while we or our<a name="line.128"></a> +<span class="sourceLineNo">129</span> // parent have held the xlock. And since there is still an exclusive lock, we do not need to<a name="line.129"></a> +<span class="sourceLineNo">130</span> // wake any procedures.<a name="line.130"></a> +<span class="sourceLineNo">131</span> return --sharedLock == 0 && !hasExclusiveLock();<a name="line.131"></a> +<span class="sourceLineNo">132</span> }<a name="line.132"></a> +<span class="sourceLineNo">133</span><a name="line.133"></a> +<span class="sourceLineNo">134</span> public boolean tryExclusiveLock(Procedure<?> proc) {<a name="line.134"></a> +<span class="sourceLineNo">135</span> if (isLocked()) {<a name="line.135"></a> +<span class="sourceLineNo">136</span> return hasLockAccess(proc);<a name="line.136"></a> +<span class="sourceLineNo">137</span> }<a name="line.137"></a> +<span class="sourceLineNo">138</span> exclusiveLockOwnerProcedure = proc;<a name="line.138"></a> +<span class="sourceLineNo">139</span> return true;<a name="line.139"></a> +<span class="sourceLineNo">140</span> }<a name="line.140"></a> +<span class="sourceLineNo">141</span><a name="line.141"></a> +<span class="sourceLineNo">142</span> /**<a name="line.142"></a> +<span class="sourceLineNo">143</span> * @return whether we should wake the procedures waiting on the lock here.<a name="line.143"></a> +<span class="sourceLineNo">144</span> */<a name="line.144"></a> +<span class="sourceLineNo">145</span> public boolean releaseExclusiveLock(Procedure<?> proc) {<a name="line.145"></a> +<span class="sourceLineNo">146</span> if (!isLockOwner(proc.getProcId())) {<a name="line.146"></a> +<span class="sourceLineNo">147</span> // We are not the lock owner, it is probably inherited from the parent procedures.<a name="line.147"></a> +<span class="sourceLineNo">148</span> return false;<a name="line.148"></a> +<span class="sourceLineNo">149</span> }<a name="line.149"></a> +<span class="sourceLineNo">150</span> exclusiveLockOwnerProcedure = null;<a name="line.150"></a> +<span class="sourceLineNo">151</span> // This maybe a bit strange so let me explain. We allow acquiring shared lock while the parent<a name="line.151"></a> +<span class="sourceLineNo">152</span> // proc or we have already held the xlock, and also allow releasing the locks in any order, so<a name="line.152"></a> +<span class="sourceLineNo">153</span> // it could happen that the xlock is released but there are still some procs holding the shared<a name="line.153"></a> +<span class="sourceLineNo">154</span> // lock.<a name="line.154"></a> +<span class="sourceLineNo">155</span> // In HBase, this could happen when a proc which holdLock is false and schedules sub procs which<a name="line.155"></a> +<span class="sourceLineNo">156</span> // acquire the shared lock on the same lock. This is because we will schedule the sub proces<a name="line.156"></a> +<span class="sourceLineNo">157</span> // before releasing the lock, so the sub procs could call acquire lock before we releasing the<a name="line.157"></a> +<span class="sourceLineNo">158</span> // xlock.<a name="line.158"></a> +<span class="sourceLineNo">159</span> return sharedLock == 0;<a name="line.159"></a> +<span class="sourceLineNo">160</span> }<a name="line.160"></a> +<span class="sourceLineNo">161</span><a name="line.161"></a> +<span class="sourceLineNo">162</span> public boolean isWaitingQueueEmpty() {<a name="line.162"></a> +<span class="sourceLineNo">163</span> return queue.isEmpty();<a name="line.163"></a> +<span class="sourceLineNo">164</span> }<a name="line.164"></a> +<span class="sourceLineNo">165</span><a name="line.165"></a> +<span class="sourceLineNo">166</span> public Procedure<?> removeFirst() {<a name="line.166"></a> +<span class="sourceLineNo">167</span> return queue.removeFirst();<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> public void addLast(Procedure<?> proc) {<a name="line.170"></a> +<span class="sourceLineNo">171</span> queue.addLast(proc);<a name="line.171"></a> +<span class="sourceLineNo">172</span> }<a name="line.172"></a> +<span class="sourceLineNo">173</span><a name="line.173"></a> +<span class="sourceLineNo">174</span> public int wakeWaitingProcedures(ProcedureScheduler scheduler) {<a name="line.174"></a> +<span class="sourceLineNo">175</span> int count = queue.size();<a name="line.175"></a> +<span class="sourceLineNo">176</span> // wakeProcedure adds to the front of queue, so we start from last in the waitQueue' queue, so<a name="line.176"></a> +<span class="sourceLineNo">177</span> // that the procedure which was added first goes in the front for the scheduler queue.<a name="line.177"></a> +<span class="sourceLineNo">178</span> scheduler.addFront(queue.descendingIterator());<a name="line.178"></a> +<span class="sourceLineNo">179</span> queue.clear();<a name="line.179"></a> +<span class="sourceLineNo">180</span> return count;<a name="line.180"></a> +<span class="sourceLineNo">181</span> }<a name="line.181"></a> +<span class="sourceLineNo">182</span><a name="line.182"></a> +<span class="sourceLineNo">183</span> @SuppressWarnings("rawtypes")<a name="line.183"></a> +<span class="sourceLineNo">184</span> public Stream<Procedure> filterWaitingQueue(Predicate<Procedure> predicate) {<a name="line.184"></a> +<span class="sourceLineNo">185</span> return queue.stream().filter(predicate);<a name="line.185"></a> +<span class="sourceLineNo">186</span> }<a name="line.186"></a> +<span class="sourceLineNo">187</span><a name="line.187"></a> +<span class="sourceLineNo">188</span> @Override<a name="line.188"></a> +<span class="sourceLineNo">189</span> public String toString() {<a name="line.189"></a> +<span class="sourceLineNo">190</span> return "exclusiveLockOwner=" + (hasExclusiveLock() ? getExclusiveLockProcIdOwner() : "NONE") +<a name="line.190"></a> +<span class="sourceLineNo">191</span> ", sharedLockCount=" + getSharedLockCount() + ", waitingProcCount=" + queue.size();<a name="line.191"></a> +<span class="sourceLineNo">192</span> }<a name="line.192"></a> +<span class="sourceLineNo">193</span>}<a name="line.193"></a>
