Switch HashMaps to ConcurrentHashMaps in ResourceMatchers

Author: Chris0296

cqf-fhir-utility/src/main/java/org/opencds/cqf/fhir/utility/matcher/ResourceMatcherDSTU3.java

@@ -8,7 +8,7 @@
 import ca.uhn.fhir.rest.param.DateRangeParam;
 import ca.uhn.fhir.rest.param.TokenParam;
 import java.util.ArrayList;
-import java.util.HashMap;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
@@ -24,8 +24,8 @@
 
 public class ResourceMatcherDSTU3 implements ResourceMatcher {
 
-    private Map<SPPathKey, IParsedExpression> pathCache = new HashMap<>();
-    private Map<String, RuntimeSearchParam> searchParams = new HashMap<>();
+    private Map<SPPathKey, IParsedExpression> pathCache = new ConcurrentHashMap<>();
+    private Map<String, RuntimeSearchParam> searchParams = new ConcurrentHashMap<>();
 
     @Override
     public IFhirPath getEngine() {

cqf-fhir-utility/src/main/java/org/opencds/cqf/fhir/utility/matcher/ResourceMatcherR4.java

@@ -8,7 +8,7 @@
 import ca.uhn.fhir.rest.param.DateRangeParam;
 import ca.uhn.fhir.rest.param.TokenParam;
 import java.util.ArrayList;
-import java.util.HashMap;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
@@ -28,8 +28,8 @@
 
 public class ResourceMatcherR4 implements ResourceMatcher {
 
-    private Map<SPPathKey, IParsedExpression> pathCache = new HashMap<>();
-    private Map<String, RuntimeSearchParam> searchParams = new HashMap<>();
+    private Map<SPPathKey, IParsedExpression> pathCache = new ConcurrentHashMap<>();
+    private Map<String, RuntimeSearchParam> searchParams = new ConcurrentHashMap<>();
 
     @Override
     public IFhirPath getEngine() {

cqf-fhir-utility/src/main/java/org/opencds/cqf/fhir/utility/matcher/ResourceMatcherR5.java

@@ -8,7 +8,7 @@
 import ca.uhn.fhir.rest.param.DateRangeParam;
 import ca.uhn.fhir.rest.param.TokenParam;
 import java.util.ArrayList;
-import java.util.HashMap;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
@@ -24,8 +24,8 @@
 
 public class ResourceMatcherR5 implements ResourceMatcher {
 
-    private Map<SPPathKey, IParsedExpression> pathCache = new HashMap<>();
-    private Map<String, RuntimeSearchParam> searchParams = new HashMap<>();
+    private Map<SPPathKey, IParsedExpression> pathCache = new ConcurrentHashMap<>();
+    private Map<String, RuntimeSearchParam> searchParams = new ConcurrentHashMap<>();
 
     @Override
     public IFhirPath getEngine() {