From db6f64eba3aeb79aa3404156e2fd2d953fee497f Mon Sep 17 00:00:00 2001
From: hoechp <send-a-mail@web.de>
Date: Sat, 25 Feb 2017 01:25:26 +0100
Subject: [PATCH] #28 added caching of JEval node evaluators

---
 .gradle/3.2/taskArtifacts/fileHashes.bin      | Bin 28247 -> 29797 bytes
 .gradle/3.2/taskArtifacts/fileSnapshots.bin   | Bin 152779 -> 217067 bytes
 .gradle/3.2/taskArtifacts/taskArtifacts.bin   | Bin 57569 -> 67941 bytes
 .gradle/3.2/taskArtifacts/taskArtifacts.lock  | Bin 17 -> 17 bytes
 build.gradle                                  |   4 +++
 .../org/fujaba/graphengine/PatternEngine.java |  25 +++++++++++++++++-
 src/main/resources/data.json                  |   2 +-
 .../unitTests/RoadworkExample.java            |  14 +++++-----
 8 files changed, 36 insertions(+), 9 deletions(-)

diff --git a/.gradle/3.2/taskArtifacts/fileHashes.bin b/.gradle/3.2/taskArtifacts/fileHashes.bin
index f65763e6dc176bb02580f3c79e0b3148564ccaba..840cbb9eadbd110d96e03ba9149f3a4c91bda3e2 100644
GIT binary patch
delta 4767
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diff --git a/.gradle/3.2/taskArtifacts/fileSnapshots.bin b/.gradle/3.2/taskArtifacts/fileSnapshots.bin
index 9367a35d6e30930ef3a848a3ead201fbfc8ebf42..67a228432142ee9cee3b12c470624567818eef01 100644
GIT binary patch
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z^EuqG`(?b+2cXx-h8eiATWy7SKdHI-rRyf$==8UqFs-BGZNw>ivN)E=C;O+t<2F|H
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rZMaW-Wo_Wb!+IMs#~a!j1{APM$a3%pfZh{FJS6SOG&p_%8-D*E2dNbI

diff --git a/.gradle/3.2/taskArtifacts/taskArtifacts.bin b/.gradle/3.2/taskArtifacts/taskArtifacts.bin
index e1a2e31795e7f25c92e635a790d695858dc55a9f..d5f23567cd1be1e94e4d13cbd1bdb643fdfb6882 100644
GIT binary patch
delta 1254
zcmaEOkooB(mI)$^+!ICptkU`!7}#zzfI<8g1iNA%0|W08h<IBPg8kqj1A~YiP<-ab
zg%#oxH?T~WlyG9o&6*r55y$jZe)C?5Lw2fDPB=<E+yB#<u{*!Cq@c9KEi)%|dgHB(
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zfEB4sVm_wfd$bp9I0Lms<@C=>ci-KfJh4qwonb%otS~zTDKt|#Ihzi18C$Tq#O+cG
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za1{9;ceeY=E1`REvo~*DHJc6S>VA$+rF90ckIz3k+3=KzRJ4l8&-=2MrMi-H5{ruq
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kioH*6_Ue6oP~+n}`)Brz!}d?%_WIJyI~&+ofc|g-0P*MkT>t<8

delta 943
zcmaDliRIxz<_RK<oD)U;tm3yYFtFWb0E65t1_tgB2)iwbfq{1kklo0@0B83iv1e{v
zSRp=f1IuJd2`8qs{>iZtaZDBaHt&@<WVbmqVkYBciAZ79?~3Bw^)Y*L7`yXJOA1O$
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zCZ6Q|mk%ux|M$jl#paK3OWE0&(is?-(l<L7Wil}_m27658_%K#42SE+zyR<DVrLL$
zWSN|lpI=g3Qj}QWoRe5wT##6jareBiPSS)Uw<a5&5|R3HBapK{z9FqE877@}Ce8Pp
zc+R`YiTfoLR=XL^{Ps<J7js`yW?oQgacNFTu}fx=>x!<GVyCRFHcY;7N}DI6Bsb@i
zh{ARDX7!@U7x$Y8<fO*m;xyXYp>Znu1KZ7)T9XB@1v1{A>=-ILIX+Bb^2F0}j91}2
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zzkbh1xV(<VjA?R8YC&pVN@`wmrE_9(Mk>&Ob5Azkx|s8Xt3M^RxFj<#u_QA;4=7y2
z^o?=N%BEB1WqOC#bUa$Nxp0a$<K`EO&a!W2+%cOCY|APAT}RCqJlqVmWtQHbB;S>B
z&e&|p|Mqd8`uhpVXtvm{_&WXl%+P#?E02;tFY6PWTsS3Sa{TJcK#Sy9!FH_J7kv3x
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zX3bMIEWl7~V%w~K^%d7-(NiKE+pFfW_}YXqfn&Zl{FBz^oSEklF~5h;w<Y)a{qx|M
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IUc0~r02Y##x&QzG

diff --git a/.gradle/3.2/taskArtifacts/taskArtifacts.lock b/.gradle/3.2/taskArtifacts/taskArtifacts.lock
index ba7a77746cbda1dc47050bb26a772bd4012a0b68..6df0e1d2f3646038e34aa2a7cc3f6633304e13ea 100644
GIT binary patch
literal 17
VcmZQ}nXzGU_5{TV3}C?02mmo^1Y`gJ

literal 17
VcmZQ}nXzGU_5{TV3}C>V4gfJu1W5n@

diff --git a/build.gradle b/build.gradle
index d3b195d..d1635a6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -17,11 +17,15 @@ dependencies {
     // The production code uses the SLF4J logging API at compile time
     compile 'org.slf4j:slf4j-api:1.7.21'
     
+    // guava
+    compile group: 'com.google.guava', name: 'guava', version: '21.0'
+    
     // gson:
     compile group: 'com.google.code.gson', name: 'gson', version: '2.8.0'
     
     // jeval:
     compile group: 'net.sourceforge.jeval', name: 'jeval', version: '0.9.4'
+    
 
     // Declare the dependency for your favourite test framework you want to use in your tests.
     // TestNG is also supported by the Gradle Test task. Just change the
diff --git a/src/main/java/org/fujaba/graphengine/PatternEngine.java b/src/main/java/org/fujaba/graphengine/PatternEngine.java
index 7e0b7af..110c4e9 100644
--- a/src/main/java/org/fujaba/graphengine/PatternEngine.java
+++ b/src/main/java/org/fujaba/graphengine/PatternEngine.java
@@ -4,6 +4,7 @@
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.concurrent.TimeUnit;
 
 import javax.naming.spi.DirStateFactory.Result;
 
@@ -16,6 +17,10 @@
 import org.fujaba.graphengine.pattern.PatternGraph;
 import org.fujaba.graphengine.pattern.PatternNode;
 
+import com.google.common.cache.CacheBuilder;
+import com.google.common.cache.CacheLoader;
+import com.google.common.cache.LoadingCache;
+
 import net.sourceforge.jeval.Evaluator;
 
 /**
@@ -25,6 +30,23 @@
  */
 public class PatternEngine {
 	
+	private static LoadingCache<Node, Evaluator> evaluatorCache = null;
+	
+	public static Evaluator getNodeEvaluator(Node node) {
+		if (evaluatorCache == null) {
+			CacheLoader<Node, Evaluator> evaluatorCacheLoader = new CacheLoader<Node, Evaluator>() {
+                public Evaluator load(Node node) {
+                    return buildNodeEvaluator(node);
+                }
+            };
+			evaluatorCache = CacheBuilder.newBuilder()
+					.maximumSize(5000)
+					.expireAfterWrite(10, TimeUnit.MINUTES)
+					.build(evaluatorCacheLoader);
+		}
+		return evaluatorCache.getUnchecked(node);
+	}
+	
 	/**
 	 * Calculates a reachability graph based on a graph of the initial situation
 	 * and a prioritized list of patterns to match and apply on the graph and resulting graphs.
@@ -953,7 +975,8 @@ public static Graph applyMatch(Match match) {
 	}
 	
 	public static boolean evaluate(Node node, String expression) {
-		return evaluate(buildNodeEvaluator(node), expression);
+		//return evaluate(buildNodeEvaluator(node), expression); // uncached
+		return evaluate(getNodeEvaluator(node), expression); // cached
 	}
 	public static Evaluator buildNodeEvaluator(Node node) {
 		Evaluator evaluator = new Evaluator();
diff --git a/src/main/resources/data.json b/src/main/resources/data.json
index 60332a5..8d91e73 100644
--- a/src/main/resources/data.json
+++ b/src/main/resources/data.json
@@ -1 +1 @@
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diff --git a/src/test/java/org/fujaba/graphengine/unitTests/RoadworkExample.java b/src/test/java/org/fujaba/graphengine/unitTests/RoadworkExample.java
index b2bb621..c10d5e7 100644
--- a/src/test/java/org/fujaba/graphengine/unitTests/RoadworkExample.java
+++ b/src/test/java/org/fujaba/graphengine/unitTests/RoadworkExample.java
@@ -379,16 +379,16 @@ private double testRoadworkExample(boolean debug, IsomorphismHandler ih, int fro
     public void testRoadworkExample() {
     	
     	ArrayList<IsomorphismHandler> toTest = new ArrayList<IsomorphismHandler>();
-    	//toTest.add(new IsomorphismHandlerParallel());
-    	//toTest.add(new IsomorphismHandlerCombinatorial());
-    	//toTest.add(new IsomorphismHandlerCSPHighHeuristics());
+    	toTest.add(new IsomorphismHandlerParallel());
+    	toTest.add(new IsomorphismHandlerCombinatorial());
+    	toTest.add(new IsomorphismHandlerCSPHighHeuristics());
     	toTest.add(new IsomorphismHandlerCSPLowHeuristics());
-    	//toTest.add(new IsomorphismHandlerDepthFirstBacktracking());
-    	//toTest.add(new IsomorphismHandlerSorting());
+    	toTest.add(new IsomorphismHandlerDepthFirstBacktracking());
+    	toTest.add(new IsomorphismHandlerSorting());
 
     	boolean debug = false;
-    	int fromLevel = 3;
-    	int toLevel = 3;
+    	int fromLevel = 1;
+    	int toLevel = 1;
     	boolean drawSigmaJs = false;
     	boolean drawAlchemyJs = false;