http://git-wip-us.apache.org/repos/asf/hbase-site/blob/96e5e102/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ScannerContext.NextState.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ScannerContext.NextState.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ScannerContext.NextState.html index 914b1c6..03a0b2a 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ScannerContext.NextState.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ScannerContext.NextState.html @@ -59,646 +59,711 @@ <span class="sourceLineNo">051</span>@InterfaceStability.Evolving<a name="line.51"></a> <span class="sourceLineNo">052</span>public class ScannerContext {<a name="line.52"></a> <span class="sourceLineNo">053</span><a name="line.53"></a> -<span class="sourceLineNo">054</span> /**<a name="line.54"></a> -<span class="sourceLineNo">055</span> * Two sets of the same fields. One for the limits, another for the progress towards those limits<a name="line.55"></a> -<span class="sourceLineNo">056</span> */<a name="line.56"></a> -<span class="sourceLineNo">057</span> LimitFields limits;<a name="line.57"></a> -<span class="sourceLineNo">058</span> LimitFields progress;<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> * The state of the scanner after the invocation of {@link InternalScanner#next(java.util.List)}<a name="line.61"></a> -<span class="sourceLineNo">062</span> * or {@link RegionScanner#next(java.util.List)}.<a name="line.62"></a> -<span class="sourceLineNo">063</span> */<a name="line.63"></a> -<span class="sourceLineNo">064</span> NextState scannerState;<a name="line.64"></a> -<span class="sourceLineNo">065</span> private static final NextState DEFAULT_STATE = NextState.MORE_VALUES;<a name="line.65"></a> -<span class="sourceLineNo">066</span><a name="line.66"></a> -<span class="sourceLineNo">067</span> /**<a name="line.67"></a> -<span class="sourceLineNo">068</span> * Used as an indication to invocations of {@link InternalScanner#next(java.util.List)} and<a name="line.68"></a> -<span class="sourceLineNo">069</span> * {@link RegionScanner#next(java.util.List)} that, if true, the progress tracked within this<a name="line.69"></a> -<span class="sourceLineNo">070</span> * {@link ScannerContext} instance should be considered while evaluating the limits. Useful for<a name="line.70"></a> -<span class="sourceLineNo">071</span> * enforcing a set of limits across multiple calls (i.e. the limit may not be reached in a single<a name="line.71"></a> -<span class="sourceLineNo">072</span> * invocation, but any progress made should be considered in future invocations)<a name="line.72"></a> -<span class="sourceLineNo">073</span> * <p><a name="line.73"></a> -<span class="sourceLineNo">074</span> * Defaulting this value to false means that, by default, any tracked progress will be wiped clean<a name="line.74"></a> -<span class="sourceLineNo">075</span> * on invocations to {@link InternalScanner#next(java.util.List)} and<a name="line.75"></a> -<span class="sourceLineNo">076</span> * {@link RegionScanner#next(java.util.List)} and the call will be treated as though no progress<a name="line.76"></a> -<span class="sourceLineNo">077</span> * has been made towards the limits so far.<a name="line.77"></a> -<span class="sourceLineNo">078</span> * <p><a name="line.78"></a> -<span class="sourceLineNo">079</span> * This is an important mechanism. Users of Internal/Region scanners expect that they can define<a name="line.79"></a> -<span class="sourceLineNo">080</span> * some limits and then repeatedly invoke {@link InternalScanner#next(List)} or<a name="line.80"></a> -<span class="sourceLineNo">081</span> * {@link RegionScanner#next(List)} where each invocation respects these limits separately.<a name="line.81"></a> -<span class="sourceLineNo">082</span> * <p><a name="line.82"></a> -<span class="sourceLineNo">083</span> * For example: <pre> {@code<a name="line.83"></a> -<span class="sourceLineNo">084</span> * ScannerContext context = new ScannerContext.newBuilder().setBatchLimit(5).build();<a name="line.84"></a> -<span class="sourceLineNo">085</span> * RegionScanner scanner = ...<a name="line.85"></a> -<span class="sourceLineNo">086</span> * List<Cell> results = new ArrayList<Cell>();<a name="line.86"></a> -<span class="sourceLineNo">087</span> * while(scanner.next(results, context)) {<a name="line.87"></a> -<span class="sourceLineNo">088</span> * // Do something with a batch of 5 cells<a name="line.88"></a> -<span class="sourceLineNo">089</span> * }<a name="line.89"></a> -<span class="sourceLineNo">090</span> * }</pre> However, in the case of RPCs, the server wants to be able to define a set of<a name="line.90"></a> -<span class="sourceLineNo">091</span> * limits for a particular RPC request and have those limits respected across multiple<a name="line.91"></a> -<span class="sourceLineNo">092</span> * invocations. This means that the progress made towards the limits in earlier calls will be<a name="line.92"></a> -<span class="sourceLineNo">093</span> * saved and considered in future invocations<a name="line.93"></a> -<span class="sourceLineNo">094</span> */<a name="line.94"></a> -<span class="sourceLineNo">095</span> boolean keepProgress;<a name="line.95"></a> -<span class="sourceLineNo">096</span> private static boolean DEFAULT_KEEP_PROGRESS = false;<a name="line.96"></a> -<span class="sourceLineNo">097</span><a name="line.97"></a> -<span class="sourceLineNo">098</span> private Cell lastPeekedCell = null;<a name="line.98"></a> +<span class="sourceLineNo">054</span> LimitFields limits;<a name="line.54"></a> +<span class="sourceLineNo">055</span> /**<a name="line.55"></a> +<span class="sourceLineNo">056</span> * A different set of progress fields. Only include batch, dataSize and heapSize. Compare to<a name="line.56"></a> +<span class="sourceLineNo">057</span> * LimitFields, ProgressFields doesn't contain time field. As we save a deadline in LimitFields,<a name="line.57"></a> +<span class="sourceLineNo">058</span> * so use {@link System#currentTimeMillis()} directly when check time limit.<a name="line.58"></a> +<span class="sourceLineNo">059</span> */<a name="line.59"></a> +<span class="sourceLineNo">060</span> ProgressFields progress;<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> * The state of the scanner after the invocation of {@link InternalScanner#next(java.util.List)}<a name="line.63"></a> +<span class="sourceLineNo">064</span> * or {@link RegionScanner#next(java.util.List)}.<a name="line.64"></a> +<span class="sourceLineNo">065</span> */<a name="line.65"></a> +<span class="sourceLineNo">066</span> NextState scannerState;<a name="line.66"></a> +<span class="sourceLineNo">067</span> private static final NextState DEFAULT_STATE = NextState.MORE_VALUES;<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> * Used as an indication to invocations of {@link InternalScanner#next(java.util.List)} and<a name="line.70"></a> +<span class="sourceLineNo">071</span> * {@link RegionScanner#next(java.util.List)} that, if true, the progress tracked within this<a name="line.71"></a> +<span class="sourceLineNo">072</span> * {@link ScannerContext} instance should be considered while evaluating the limits. Useful for<a name="line.72"></a> +<span class="sourceLineNo">073</span> * enforcing a set of limits across multiple calls (i.e. the limit may not be reached in a single<a name="line.73"></a> +<span class="sourceLineNo">074</span> * invocation, but any progress made should be considered in future invocations)<a name="line.74"></a> +<span class="sourceLineNo">075</span> * <p><a name="line.75"></a> +<span class="sourceLineNo">076</span> * Defaulting this value to false means that, by default, any tracked progress will be wiped clean<a name="line.76"></a> +<span class="sourceLineNo">077</span> * on invocations to {@link InternalScanner#next(java.util.List)} and<a name="line.77"></a> +<span class="sourceLineNo">078</span> * {@link RegionScanner#next(java.util.List)} and the call will be treated as though no progress<a name="line.78"></a> +<span class="sourceLineNo">079</span> * has been made towards the limits so far.<a name="line.79"></a> +<span class="sourceLineNo">080</span> * <p><a name="line.80"></a> +<span class="sourceLineNo">081</span> * This is an important mechanism. Users of Internal/Region scanners expect that they can define<a name="line.81"></a> +<span class="sourceLineNo">082</span> * some limits and then repeatedly invoke {@link InternalScanner#next(List)} or<a name="line.82"></a> +<span class="sourceLineNo">083</span> * {@link RegionScanner#next(List)} where each invocation respects these limits separately.<a name="line.83"></a> +<span class="sourceLineNo">084</span> * <p><a name="line.84"></a> +<span class="sourceLineNo">085</span> * For example: <pre> {@code<a name="line.85"></a> +<span class="sourceLineNo">086</span> * ScannerContext context = new ScannerContext.newBuilder().setBatchLimit(5).build();<a name="line.86"></a> +<span class="sourceLineNo">087</span> * RegionScanner scanner = ...<a name="line.87"></a> +<span class="sourceLineNo">088</span> * List<Cell> results = new ArrayList<Cell>();<a name="line.88"></a> +<span class="sourceLineNo">089</span> * while(scanner.next(results, context)) {<a name="line.89"></a> +<span class="sourceLineNo">090</span> * // Do something with a batch of 5 cells<a name="line.90"></a> +<span class="sourceLineNo">091</span> * }<a name="line.91"></a> +<span class="sourceLineNo">092</span> * }</pre> However, in the case of RPCs, the server wants to be able to define a set of<a name="line.92"></a> +<span class="sourceLineNo">093</span> * limits for a particular RPC request and have those limits respected across multiple<a name="line.93"></a> +<span class="sourceLineNo">094</span> * invocations. This means that the progress made towards the limits in earlier calls will be<a name="line.94"></a> +<span class="sourceLineNo">095</span> * saved and considered in future invocations<a name="line.95"></a> +<span class="sourceLineNo">096</span> */<a name="line.96"></a> +<span class="sourceLineNo">097</span> boolean keepProgress;<a name="line.97"></a> +<span class="sourceLineNo">098</span> private static boolean DEFAULT_KEEP_PROGRESS = false;<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> * Tracks the relevant server side metrics during scans. null when metrics should not be tracked<a name="line.101"></a> -<span class="sourceLineNo">102</span> */<a name="line.102"></a> -<span class="sourceLineNo">103</span> final ServerSideScanMetrics metrics;<a name="line.103"></a> -<span class="sourceLineNo">104</span><a name="line.104"></a> -<span class="sourceLineNo">105</span> ScannerContext(boolean keepProgress, LimitFields limitsToCopy, boolean trackMetrics) {<a name="line.105"></a> -<span class="sourceLineNo">106</span> this.limits = new LimitFields();<a name="line.106"></a> -<span class="sourceLineNo">107</span> if (limitsToCopy != null) this.limits.copy(limitsToCopy);<a name="line.107"></a> -<span class="sourceLineNo">108</span><a name="line.108"></a> -<span class="sourceLineNo">109</span> // Progress fields are initialized to 0<a name="line.109"></a> -<span class="sourceLineNo">110</span> progress = new LimitFields(0, LimitFields.DEFAULT_SCOPE, 0, 0, LimitFields.DEFAULT_SCOPE, 0);<a name="line.110"></a> -<span class="sourceLineNo">111</span><a name="line.111"></a> -<span class="sourceLineNo">112</span> this.keepProgress = keepProgress;<a name="line.112"></a> -<span class="sourceLineNo">113</span> this.scannerState = DEFAULT_STATE;<a name="line.113"></a> -<span class="sourceLineNo">114</span> this.metrics = trackMetrics ? new ServerSideScanMetrics() : null;<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> boolean isTrackingMetrics() {<a name="line.117"></a> -<span class="sourceLineNo">118</span> return this.metrics != null;<a name="line.118"></a> +<span class="sourceLineNo">100</span> private Cell lastPeekedCell = null;<a name="line.100"></a> +<span class="sourceLineNo">101</span><a name="line.101"></a> +<span class="sourceLineNo">102</span> /**<a name="line.102"></a> +<span class="sourceLineNo">103</span> * Tracks the relevant server side metrics during scans. null when metrics should not be tracked<a name="line.103"></a> +<span class="sourceLineNo">104</span> */<a name="line.104"></a> +<span class="sourceLineNo">105</span> final ServerSideScanMetrics metrics;<a name="line.105"></a> +<span class="sourceLineNo">106</span><a name="line.106"></a> +<span class="sourceLineNo">107</span> ScannerContext(boolean keepProgress, LimitFields limitsToCopy, boolean trackMetrics) {<a name="line.107"></a> +<span class="sourceLineNo">108</span> this.limits = new LimitFields();<a name="line.108"></a> +<span class="sourceLineNo">109</span> if (limitsToCopy != null) {<a name="line.109"></a> +<span class="sourceLineNo">110</span> this.limits.copy(limitsToCopy);<a name="line.110"></a> +<span class="sourceLineNo">111</span> }<a name="line.111"></a> +<span class="sourceLineNo">112</span><a name="line.112"></a> +<span class="sourceLineNo">113</span> // Progress fields are initialized to 0<a name="line.113"></a> +<span class="sourceLineNo">114</span> progress = new ProgressFields(0, 0, 0);<a name="line.114"></a> +<span class="sourceLineNo">115</span><a name="line.115"></a> +<span class="sourceLineNo">116</span> this.keepProgress = keepProgress;<a name="line.116"></a> +<span class="sourceLineNo">117</span> this.scannerState = DEFAULT_STATE;<a name="line.117"></a> +<span class="sourceLineNo">118</span> this.metrics = trackMetrics ? new ServerSideScanMetrics() : null;<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> /**<a name="line.121"></a> -<span class="sourceLineNo">122</span> * Get the metrics instance. Should only be called after a call to {@link #isTrackingMetrics()}<a name="line.122"></a> -<span class="sourceLineNo">123</span> * has been made to confirm that metrics are indeed being tracked.<a name="line.123"></a> -<span class="sourceLineNo">124</span> * @return {@link ServerSideScanMetrics} instance that is tracking metrics for this scan<a name="line.124"></a> -<span class="sourceLineNo">125</span> */<a name="line.125"></a> -<span class="sourceLineNo">126</span> ServerSideScanMetrics getMetrics() {<a name="line.126"></a> -<span class="sourceLineNo">127</span> assert isTrackingMetrics();<a name="line.127"></a> -<span class="sourceLineNo">128</span> return this.metrics;<a name="line.128"></a> -<span class="sourceLineNo">129</span> }<a name="line.129"></a> -<span class="sourceLineNo">130</span><a name="line.130"></a> -<span class="sourceLineNo">131</span> /**<a name="line.131"></a> -<span class="sourceLineNo">132</span> * @return true if the progress tracked so far in this instance will be considered during an<a name="line.132"></a> -<span class="sourceLineNo">133</span> * invocation of {@link InternalScanner#next(java.util.List)} or<a name="line.133"></a> -<span class="sourceLineNo">134</span> * {@link RegionScanner#next(java.util.List)}. false when the progress tracked so far<a name="line.134"></a> -<span class="sourceLineNo">135</span> * should not be considered and should instead be wiped away via {@link #clearProgress()}<a name="line.135"></a> -<span class="sourceLineNo">136</span> */<a name="line.136"></a> -<span class="sourceLineNo">137</span> boolean getKeepProgress() {<a name="line.137"></a> -<span class="sourceLineNo">138</span> return keepProgress;<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> void setKeepProgress(boolean keepProgress) {<a name="line.141"></a> -<span class="sourceLineNo">142</span> this.keepProgress = keepProgress;<a name="line.142"></a> +<span class="sourceLineNo">121</span> boolean isTrackingMetrics() {<a name="line.121"></a> +<span class="sourceLineNo">122</span> return this.metrics != null;<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> /**<a name="line.125"></a> +<span class="sourceLineNo">126</span> * Get the metrics instance. Should only be called after a call to {@link #isTrackingMetrics()}<a name="line.126"></a> +<span class="sourceLineNo">127</span> * has been made to confirm that metrics are indeed being tracked.<a name="line.127"></a> +<span class="sourceLineNo">128</span> * @return {@link ServerSideScanMetrics} instance that is tracking metrics for this scan<a name="line.128"></a> +<span class="sourceLineNo">129</span> */<a name="line.129"></a> +<span class="sourceLineNo">130</span> ServerSideScanMetrics getMetrics() {<a name="line.130"></a> +<span class="sourceLineNo">131</span> assert isTrackingMetrics();<a name="line.131"></a> +<span class="sourceLineNo">132</span> return this.metrics;<a name="line.132"></a> +<span class="sourceLineNo">133</span> }<a name="line.133"></a> +<span class="sourceLineNo">134</span><a name="line.134"></a> +<span class="sourceLineNo">135</span> /**<a name="line.135"></a> +<span class="sourceLineNo">136</span> * @return true if the progress tracked so far in this instance will be considered during an<a name="line.136"></a> +<span class="sourceLineNo">137</span> * invocation of {@link InternalScanner#next(java.util.List)} or<a name="line.137"></a> +<span class="sourceLineNo">138</span> * {@link RegionScanner#next(java.util.List)}. false when the progress tracked so far<a name="line.138"></a> +<span class="sourceLineNo">139</span> * should not be considered and should instead be wiped away via {@link #clearProgress()}<a name="line.139"></a> +<span class="sourceLineNo">140</span> */<a name="line.140"></a> +<span class="sourceLineNo">141</span> boolean getKeepProgress() {<a name="line.141"></a> +<span class="sourceLineNo">142</span> return keepProgress;<a name="line.142"></a> <span class="sourceLineNo">143</span> }<a name="line.143"></a> <span class="sourceLineNo">144</span><a name="line.144"></a> -<span class="sourceLineNo">145</span> /**<a name="line.145"></a> -<span class="sourceLineNo">146</span> * Progress towards the batch limit has been made. Increment internal tracking of batch progress<a name="line.146"></a> -<span class="sourceLineNo">147</span> */<a name="line.147"></a> -<span class="sourceLineNo">148</span> void incrementBatchProgress(int batch) {<a name="line.148"></a> -<span class="sourceLineNo">149</span> int currentBatch = progress.getBatch();<a name="line.149"></a> -<span class="sourceLineNo">150</span> progress.setBatch(currentBatch + batch);<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> /**<a name="line.153"></a> -<span class="sourceLineNo">154</span> * Progress towards the size limit has been made. Increment internal tracking of size progress<a name="line.154"></a> -<span class="sourceLineNo">155</span> */<a name="line.155"></a> -<span class="sourceLineNo">156</span> void incrementSizeProgress(long dataSize, long heapSize) {<a name="line.156"></a> -<span class="sourceLineNo">157</span> long curDataSize = progress.getDataSize();<a name="line.157"></a> -<span class="sourceLineNo">158</span> progress.setDataSize(curDataSize + dataSize);<a name="line.158"></a> -<span class="sourceLineNo">159</span> long curHeapSize = progress.getHeapSize();<a name="line.159"></a> -<span class="sourceLineNo">160</span> progress.setHeapSize(curHeapSize + heapSize);<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> /**<a name="line.163"></a> -<span class="sourceLineNo">164</span> * Update the time progress with {@link System#currentTimeMillis()}<a name="line.164"></a> -<span class="sourceLineNo">165</span> */<a name="line.165"></a> -<span class="sourceLineNo">166</span> void updateTimeProgress() {<a name="line.166"></a> -<span class="sourceLineNo">167</span> progress.setTime(System.currentTimeMillis());<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> int getBatchProgress() {<a name="line.170"></a> -<span class="sourceLineNo">171</span> return progress.getBatch();<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> long getDataSizeProgress() {<a name="line.174"></a> -<span class="sourceLineNo">175</span> return progress.getDataSize();<a name="line.175"></a> -<span class="sourceLineNo">176</span> }<a name="line.176"></a> -<span class="sourceLineNo">177</span><a name="line.177"></a> -<span class="sourceLineNo">178</span> long getHeapSizeProgress() {<a name="line.178"></a> -<span class="sourceLineNo">179</span> return progress.getHeapSize();<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> long getTimeProgress() {<a name="line.182"></a> -<span class="sourceLineNo">183</span> return progress.getTime();<a name="line.183"></a> -<span class="sourceLineNo">184</span> }<a name="line.184"></a> -<span class="sourceLineNo">185</span><a name="line.185"></a> -<span class="sourceLineNo">186</span> void setProgress(int batchProgress, long sizeProgress, long heapSizeProgress, long timeProgress) {<a name="line.186"></a> -<span class="sourceLineNo">187</span> setBatchProgress(batchProgress);<a name="line.187"></a> -<span class="sourceLineNo">188</span> setSizeProgress(sizeProgress, heapSizeProgress);<a name="line.188"></a> -<span class="sourceLineNo">189</span> setTimeProgress(timeProgress);<a name="line.189"></a> -<span class="sourceLineNo">190</span> }<a name="line.190"></a> -<span class="sourceLineNo">191</span><a name="line.191"></a> -<span class="sourceLineNo">192</span> void setSizeProgress(long dataSizeProgress, long heapSizeProgress) {<a name="line.192"></a> -<span class="sourceLineNo">193</span> progress.setDataSize(dataSizeProgress);<a name="line.193"></a> -<span class="sourceLineNo">194</span> progress.setHeapSize(heapSizeProgress);<a name="line.194"></a> -<span class="sourceLineNo">195</span> }<a name="line.195"></a> -<span class="sourceLineNo">196</span><a name="line.196"></a> -<span class="sourceLineNo">197</span> void setBatchProgress(int batchProgress) {<a name="line.197"></a> -<span class="sourceLineNo">198</span> progress.setBatch(batchProgress);<a name="line.198"></a> +<span class="sourceLineNo">145</span> void setKeepProgress(boolean keepProgress) {<a name="line.145"></a> +<span class="sourceLineNo">146</span> this.keepProgress = keepProgress;<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> /**<a name="line.149"></a> +<span class="sourceLineNo">150</span> * Progress towards the batch limit has been made. Increment internal tracking of batch progress<a name="line.150"></a> +<span class="sourceLineNo">151</span> */<a name="line.151"></a> +<span class="sourceLineNo">152</span> void incrementBatchProgress(int batch) {<a name="line.152"></a> +<span class="sourceLineNo">153</span> int currentBatch = progress.getBatch();<a name="line.153"></a> +<span class="sourceLineNo">154</span> progress.setBatch(currentBatch + batch);<a name="line.154"></a> +<span class="sourceLineNo">155</span> }<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> * Progress towards the size limit has been made. 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All progress fields are reset to initial<a name="line.194"></a> +<span class="sourceLineNo">195</span> * values<a name="line.195"></a> +<span class="sourceLineNo">196</span> */<a name="line.196"></a> +<span class="sourceLineNo">197</span> void clearProgress() {<a name="line.197"></a> +<span class="sourceLineNo">198</span> progress.setFields(0, 0, 0);<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> void setTimeProgress(long timeProgress) {<a name="line.201"></a> -<span class="sourceLineNo">202</span> progress.setTime(timeProgress);<a name="line.202"></a> -<span class="sourceLineNo">203</span> }<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">206</span> * Clear away any progress that has been made so far. 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}<a name="line.263"></a> -<span class="sourceLineNo">264</span><a name="line.264"></a> -<span class="sourceLineNo">265</span> /**<a name="line.265"></a> -<span class="sourceLineNo">266</span> * @param checkerScope<a name="line.266"></a> -<span class="sourceLineNo">267</span> * @return true if any limit can be enforced within the checker's scope<a name="line.267"></a> -<span class="sourceLineNo">268</span> */<a name="line.268"></a> -<span class="sourceLineNo">269</span> boolean hasAnyLimit(LimitScope checkerScope) {<a name="line.269"></a> -<span class="sourceLineNo">270</span> return hasBatchLimit(checkerScope) || hasSizeLimit(checkerScope) || hasTimeLimit(checkerScope);<a name="line.270"></a> -<span class="sourceLineNo">271</span> }<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> * @param scope The scope in which the size limit will be enforced<a 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class="sourceLineNo">210</span> if (!NextState.isValidState(state)) {<a name="line.210"></a> +<span class="sourceLineNo">211</span> throw new IllegalArgumentException("Cannot set to invalid state: " + state);<a name="line.211"></a> +<span class="sourceLineNo">212</span> }<a name="line.212"></a> +<span class="sourceLineNo">213</span><a name="line.213"></a> +<span class="sourceLineNo">214</span> this.scannerState = state;<a name="line.214"></a> +<span class="sourceLineNo">215</span> return state;<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> /**<a name="line.218"></a> +<span class="sourceLineNo">219</span> * @return true when we have more cells for the current row. This usually because we have reached<a name="line.219"></a> +<span class="sourceLineNo">220</span> * a limit in the middle of a row<a name="line.220"></a> +<span class="sourceLineNo">221</span> */<a name="line.221"></a> +<span class="sourceLineNo">222</span> boolean mayHaveMoreCellsInRow() {<a name="line.222"></a> +<span class="sourceLineNo">223</span> return scannerState == NextState.SIZE_LIMIT_REACHED_MID_ROW ||<a name="line.223"></a> +<span class="sourceLineNo">224</span> scannerState == NextState.TIME_LIMIT_REACHED_MID_ROW ||<a name="line.224"></a> +<span class="sourceLineNo">225</span> scannerState == NextState.BATCH_LIMIT_REACHED;<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> * @param checkerScope<a name="line.229"></a> +<span class="sourceLineNo">230</span> * @return true if the batch limit can be enforced in the checker's scope<a name="line.230"></a> +<span class="sourceLineNo">231</span> */<a name="line.231"></a> +<span class="sourceLineNo">232</span> boolean hasBatchLimit(LimitScope checkerScope) {<a name="line.232"></a> +<span class="sourceLineNo">233</span> return limits.canEnforceBatchLimitFromScope(checkerScope) && limits.getBatch() > 0;<a name="line.233"></a> +<span class="sourceLineNo">234</span> }<a name="line.234"></a> +<span class="sourceLineNo">235</span><a name="line.235"></a> +<span class="sourceLineNo">236</span> /**<a name="line.236"></a> +<span class="sourceLineNo">237</span> * @param checkerScope<a name="line.237"></a> +<span class="sourceLineNo">238</span> * @return true if the size limit can be enforced in the checker's scope<a name="line.238"></a> +<span class="sourceLineNo">239</span> */<a name="line.239"></a> +<span class="sourceLineNo">240</span> boolean hasSizeLimit(LimitScope checkerScope) {<a name="line.240"></a> +<span class="sourceLineNo">241</span> return limits.canEnforceSizeLimitFromScope(checkerScope)<a name="line.241"></a> +<span class="sourceLineNo">242</span> && (limits.getDataSize() > 0 || limits.getHeapSize() > 0);<a name="line.242"></a> +<span class="sourceLineNo">243</span> }<a name="line.243"></a> +<span class="sourceLineNo">244</span><a name="line.244"></a> +<span class="sourceLineNo">245</span> /**<a name="line.245"></a> +<span class="sourceLineNo">246</span> * @param checkerScope<a name="line.246"></a> +<span class="sourceLineNo">247</span> * @return true if the time limit can be enforced in the checker's scope<a name="line.247"></a> +<span class="sourceLineNo">248</span> */<a name="line.248"></a> +<span class="sourceLineNo">249</span> boolean hasTimeLimit(LimitScope checkerScope) {<a name="line.249"></a> +<span class="sourceLineNo">250</span> return limits.canEnforceTimeLimitFromScope(checkerScope) && limits.getTime() > 0;<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> /**<a name="line.253"></a> +<span class="sourceLineNo">254</span> * @param checkerScope<a name="line.254"></a> +<span class="sourceLineNo">255</span> * @return true if any limit can be enforced within the checker's scope<a name="line.255"></a> +<span class="sourceLineNo">256</span> */<a name="line.256"></a> +<span class="sourceLineNo">257</span> boolean hasAnyLimit(LimitScope checkerScope) {<a name="line.257"></a> +<span class="sourceLineNo">258</span> return hasBatchLimit(checkerScope) || hasSizeLimit(checkerScope) || hasTimeLimit(checkerScope);<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> * @param scope The scope in which the size limit will be enforced<a 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class="sourceLineNo">415</span><a name="line.415"></a> -<span class="sourceLineNo">416</span> /**<a name="line.416"></a> -<span class="sourceLineNo">417</span> * The possible states a scanner may be in following a call to {@link InternalScanner#next(List)}<a name="line.417"></a> -<span class="sourceLineNo">418</span> */<a name="line.418"></a> -<span class="sourceLineNo">419</span> public enum NextState {<a name="line.419"></a> -<span class="sourceLineNo">420</span> MORE_VALUES(true, false),<a name="line.420"></a> -<span class="sourceLineNo">421</span> NO_MORE_VALUES(false, false),<a name="line.421"></a> -<span class="sourceLineNo">422</span> SIZE_LIMIT_REACHED(true, true),<a name="line.422"></a> -<span class="sourceLineNo">423</span><a name="line.423"></a> -<span class="sourceLineNo">424</span> /**<a name="line.424"></a> -<span class="sourceLineNo">425</span> * Special case of size limit reached to indicate that the size limit was reached in the middle<a name="line.425"></a> -<span 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class="sourceLineNo">453</span> public static boolean hasMoreValues(NextState state) {<a name="line.453"></a> +<span class="sourceLineNo">454</span> return isValidState(state) && state.hasMoreValues();<a name="line.454"></a> +<span class="sourceLineNo">455</span> }<a name="line.455"></a> +<span class="sourceLineNo">456</span> }<a name="line.456"></a> +<span class="sourceLineNo">457</span><a name="line.457"></a> +<span class="sourceLineNo">458</span> /**<a name="line.458"></a> +<span class="sourceLineNo">459</span> * The various scopes where a limit can be enforced. Used to differentiate when a limit should be<a name="line.459"></a> +<span class="sourceLineNo">460</span> * enforced or not.<a name="line.460"></a> +<span class="sourceLineNo">461</span> */<a name="line.461"></a> +<span class="sourceLineNo">462</span> public enum LimitScope {<a name="line.462"></a> +<span class="sourceLineNo">463</span> /**<a name="line.463"></a> +<span class="sourceLineNo">464</span> * Enforcing a limit between rows means that the limit will not be considered until all the<a name="line.464"></a> +<span class="sourceLineNo">465</span> * cells for a particular row have been retrieved<a name="line.465"></a> +<span class="sourceLineNo">466</span> */<a name="line.466"></a> +<span class="sourceLineNo">467</span> BETWEEN_ROWS(0),<a name="line.467"></a> +<span class="sourceLineNo">468</span><a name="line.468"></a> +<span class="sourceLineNo">469</span> /**<a name="line.469"></a> +<span class="sourceLineNo">470</span> * Enforcing a limit between cells means that the limit will be considered after each full cell<a name="line.470"></a> +<span class="sourceLineNo">471</span> * has been retrieved<a name="line.471"></a> +<span class="sourceLineNo">472</span> */<a name="line.472"></a> +<span class="sourceLineNo">473</span> BETWEEN_CELLS(1);<a name="line.473"></a> +<span class="sourceLineNo">474</span><a name="line.474"></a> <span class="sourceLineNo">475</span> /**<a name="line.475"></a> -<span class="sourceLineNo">476</span> * Enforcing a limit between rows means that the limit will not be considered until all the<a name="line.476"></a> -<span class="sourceLineNo">477</span> * cells for a particular row have been retrieved<a name="line.477"></a> -<span class="sourceLineNo">478</span> */<a name="line.478"></a> -<span class="sourceLineNo">479</span> BETWEEN_ROWS(0),<a name="line.479"></a> -<span class="sourceLineNo">480</span><a name="line.480"></a> -<span class="sourceLineNo">481</span> /**<a name="line.481"></a> -<span class="sourceLineNo">482</span> * Enforcing a limit between cells means that the limit will be considered after each full cell<a name="line.482"></a> -<span class="sourceLineNo">483</span> * has been retrieved<a name="line.483"></a> -<span class="sourceLineNo">484</span> */<a name="line.484"></a> -<span class="sourceLineNo">485</span> BETWEEN_CELLS(1);<a name="line.485"></a> -<span class="sourceLineNo">486</span><a name="line.486"></a> -<span class="sourceLineNo">487</span> /**<a name="line.487"></a> -<span class="sourceLineNo">488</span> * When enforcing a limit, we must check that the scope is appropriate for enforcement.<a name="line.488"></a> -<span class="sourceLineNo">489</span> * <p><a name="line.489"></a> -<span class="sourceLineNo">490</span> * To communicate this concept, each scope has a depth. 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A limit will be enforced if the depth of<a name="line.478"></a> +<span class="sourceLineNo">479</span> * the checker's scope is less than or equal to the limit's scope. This means that when checking<a name="line.479"></a> +<span class="sourceLineNo">480</span> * limits, the checker must know their own scope (i.e. are they checking the limits between<a name="line.480"></a> +<span class="sourceLineNo">481</span> * rows, between cells, etc...)<a name="line.481"></a> +<span class="sourceLineNo">482</span> */<a name="line.482"></a> +<span class="sourceLineNo">483</span> final int depth;<a name="line.483"></a> +<span class="sourceLineNo">484</span><a name="line.484"></a> +<span class="sourceLineNo">485</span> LimitScope(int depth) {<a name="line.485"></a> +<span class="sourceLineNo">486</span> this.depth = depth;<a name="line.486"></a> +<span class="sourceLineNo">487</span> }<a name="line.487"></a> +<span class="sourceLineNo">488</span><a name="line.488"></a> +<span class="sourceLineNo">489</span> final int depth() {<a name="line.489"></a> +<span class="sourceLineNo">490</span> return depth;<a name="line.490"></a> +<span class="sourceLineNo">491</span> }<a name="line.491"></a> +<span class="sourceLineNo">492</span><a name="line.492"></a> +<span class="sourceLineNo">493</span> /**<a name="line.493"></a> +<span class="sourceLineNo">494</span> * @param checkerScope The scope in which the limit is being checked<a name="line.494"></a> +<span class="sourceLineNo">495</span> * @return true when the checker is in a scope that indicates the limit can be enforced. 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Defined such that if a field does NOT change from its<a name="line.510"></a> +<span class="sourceLineNo">511</span> * default, it will not be enforced<a name="line.511"></a> +<span class="sourceLineNo">512</span> */<a name="line.512"></a> +<span class="sourceLineNo">513</span> private static int DEFAULT_BATCH = -1;<a name="line.513"></a> +<span class="sourceLineNo">514</span> private static long DEFAULT_SIZE = -1L;<a name="line.514"></a> +<span
<TRUNCATED>
