Add UUIDPathMinter (and wire it into webapp by default) that prefixes…

… a generated uuid with some branch nodes to help manage level width
fcrepo · Jun 25, 2013 · dfd898c · dfd898c
1 parent f635e17
commit dfd898c
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diff --git a/fcrepo-kernel/src/main/java/org/fcrepo/identifiers/UUIDPathMinter.java b/fcrepo-kernel/src/main/java/org/fcrepo/identifiers/UUIDPathMinter.java
@@ -0,0 +1,37 @@
+package org.fcrepo.identifiers;
+
+import com.codahale.metrics.Timer;
+import com.google.common.base.Joiner;
+import com.google.common.base.Splitter;
+
+import static com.codahale.metrics.MetricRegistry.name;
+import static java.util.UUID.randomUUID;
+import static org.fcrepo.metrics.RegistryService.getMetrics;
+
+/**
+ * PID minter that creates hierarchical IDs for a UUID
+ */
+public class UUIDPathMinter extends BasePidMinter {
+
+    static final Timer timer = getMetrics().timer(name(UUIDPathMinter.class, "mint"));
+
+
+    /**
+     * Mint a unique identifier as a UUID
+     * @return
+     */
+    @Override
+    public String mintPid() {
+
+        final Timer.Context context = timer.time();
+
+        try {
+            final String s = randomUUID().toString();
+            final Iterable<String> split = Splitter.fixedLength(2).split(s.substring(0, 8));
+
+            return Joiner.on("/").join(split) + "/" + s;
+        } finally {
+            context.stop();
+        }
+    }
+}
diff --git a/fcrepo-kernel/src/test/java/org/fcrepo/identifiers/UUIDPathMinterTest.java b/fcrepo-kernel/src/test/java/org/fcrepo/identifiers/UUIDPathMinterTest.java
@@ -0,0 +1,36 @@
+/**
+ * The contents of this file are subject to the license and copyright terms
+ * detailed in the license directory at the root of the source tree (also
+ * available online at http://fedora-commons.org/license/).
+ */
+
+package org.fcrepo.identifiers;
+
+import org.junit.Test;
+
+import static java.util.regex.Pattern.compile;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * @todo Add Documentation.
+ * @author Chris Beer
+ * @date Mar 14, 2013
+ */
+public class UUIDPathMinterTest {
+
+    /**
+     * @todo Add Documentation.
+     */
+    @Test
+    public void testMintPid() throws Exception {
+
+        final PidMinter pidMinter = new UUIDPathMinter();
+
+        final String pid = pidMinter.mintPid();
+
+        assertTrue("PID wasn't a UUID path", compile(
+                "[a-f0-9]{3}/[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}")
+                .matcher(pid).find());
+
+    }
+}
diff --git a/fcrepo-webapp/src/main/resources/spring/rest.xml b/fcrepo-webapp/src/main/resources/spring/rest.xml
@@ -13,7 +13,7 @@
     <context:annotation-config/>
 
     <!-- Mints PIDs-->
-    <bean class="org.fcrepo.identifiers.UUIDPidMinter"/>
+    <bean class="org.fcrepo.identifiers.UUIDPathMinter"/>
     <bean class="org.fcrepo.session.SessionFactory"/>
 
     <context:component-scan base-package="org.fcrepo.services, org.modeshape.web.jcr.rest, org.fcrepo.api, org.fcrepo.serialization, org.fcrepo.responses, org.fcrepo.exceptionhandlers, org.fcrepo.audit, org.fcrepo.url"/>