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Posted to commits@clerezza.apache.org by re...@apache.org on 2013/12/19 11:28:56 UTC
git commit: CLEREZZA-856: some first playing on a sparql storage
backend
Updated Branches:
refs/heads/CLEREZZA-856 [created] ea6a70ce0
CLEREZZA-856: some first playing on a sparql storage backend
Project: http://git-wip-us.apache.org/repos/asf/clerezza/repo
Commit: http://git-wip-us.apache.org/repos/asf/clerezza/commit/ea6a70ce
Tree: http://git-wip-us.apache.org/repos/asf/clerezza/tree/ea6a70ce
Diff: http://git-wip-us.apache.org/repos/asf/clerezza/diff/ea6a70ce
Branch: refs/heads/CLEREZZA-856
Commit: ea6a70ce0849116337687ed7fab1808d492741af
Parents: 0627f04
Author: Reto Bachmann-Gmür <re...@apache.org>
Authored: Thu Dec 19 11:28:13 2013 +0100
Committer: Reto Bachmann-Gmür <re...@apache.org>
Committed: Thu Dec 19 11:28:13 2013 +0100
----------------------------------------------------------------------
rdf.storage.sparql/LICENSE | 201 +++++++++++++++
rdf.storage.sparql/nb-configuration.xml | 18 ++
rdf.storage.sparql/nbactions.xml | 22 ++
rdf.storage.sparql/pom.xml | 124 +++++++++
.../storage/sparql/SparqlStorageProvider.scala | 252 +++++++++++++++++++
5 files changed, 617 insertions(+)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/clerezza/blob/ea6a70ce/rdf.storage.sparql/LICENSE
----------------------------------------------------------------------
diff --git a/rdf.storage.sparql/LICENSE b/rdf.storage.sparql/LICENSE
new file mode 100644
index 0000000..261eeb9
--- /dev/null
+++ b/rdf.storage.sparql/LICENSE
@@ -0,0 +1,201 @@
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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+ 1. Definitions.
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+ 6. Trademarks. This License does not grant permission to use the trade
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+ 7. Disclaimer of Warranty. Unless required by applicable law or
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+ incurred by, or claims asserted against, such Contributor by reason
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+ Unless required by applicable law or agreed to in writing, software
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http://git-wip-us.apache.org/repos/asf/clerezza/blob/ea6a70ce/rdf.storage.sparql/nb-configuration.xml
----------------------------------------------------------------------
diff --git a/rdf.storage.sparql/nb-configuration.xml b/rdf.storage.sparql/nb-configuration.xml
new file mode 100644
index 0000000..ec4540c
--- /dev/null
+++ b/rdf.storage.sparql/nb-configuration.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project-shared-configuration>
+ <!--
+This file contains additional configuration written by modules in the NetBeans IDE.
+The configuration is intended to be shared among all the users of project and
+therefore it is assumed to be part of version control checkout.
+Without this configuration present, some functionality in the IDE may be limited or fail altogether.
+-->
+ <properties xmlns="http://www.netbeans.org/ns/maven-properties-data/1">
+ <!--
+Properties that influence various parts of the IDE, especially code formatting and the like.
+You can copy and paste the single properties, into the pom.xml file and the IDE will pick them up.
+That way multiple projects can share the same settings (useful for formatting rules for example).
+Any value defined here will override the pom.xml file value but is only applicable to the current project.
+-->
+ <netbeans.compile.on.save>none</netbeans.compile.on.save>
+ </properties>
+</project-shared-configuration>
http://git-wip-us.apache.org/repos/asf/clerezza/blob/ea6a70ce/rdf.storage.sparql/nbactions.xml
----------------------------------------------------------------------
diff --git a/rdf.storage.sparql/nbactions.xml b/rdf.storage.sparql/nbactions.xml
new file mode 100644
index 0000000..ffd7a0f
--- /dev/null
+++ b/rdf.storage.sparql/nbactions.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<actions>
+ <action>
+ <actionName>CUSTOM-deploy to localhost:8080</actionName>
+ <displayName>deploy to localhost:8080</displayName>
+ <goals>
+ <goal>install</goal>
+ <goal>org.apache.sling:maven-sling-plugin:install</goal>
+ </goals>
+ </action>
+ <action>
+ <actionName>CUSTOM-fusepool-info</actionName>
+ <displayName>fusepool-info</displayName>
+ <goals>
+ <goal>install</goal>
+ <goal>org.apache.sling:maven-sling-plugin:install</goal>
+ </goals>
+ <properties>
+ <sling.url>http://platform.fusepool.info/system/console</sling.url>
+ </properties>
+ </action>
+</actions>
http://git-wip-us.apache.org/repos/asf/clerezza/blob/ea6a70ce/rdf.storage.sparql/pom.xml
----------------------------------------------------------------------
diff --git a/rdf.storage.sparql/pom.xml b/rdf.storage.sparql/pom.xml
new file mode 100644
index 0000000..cbe1614
--- /dev/null
+++ b/rdf.storage.sparql/pom.xml
@@ -0,0 +1,124 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<!--
+
+ Licensed to the Apache Software Foundation (ASF) under one
+ or more contributor license agreements. See the NOTICE file
+ distributed with this work for additional information
+ regarding copyright ownership. The ASF licenses this file
+ to you under the Apache License, Version 2.0 (the
+ "License"); you may not use this file except in compliance
+ with the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing,
+ software distributed under the License is distributed on an
+ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ KIND, either express or implied. See the License for the
+ specific language governing permissions and limitations
+ under the License.
+
+ -->
+
+ <modelVersion>4.0.0</modelVersion>
+ <parent>
+ <groupId>org.apache.clerezza</groupId>
+ <artifactId>clerezza</artifactId>
+ <version>0.5-SNAPSHOT</version>
+ <relativePath>../parent</relativePath>
+ </parent>
+ <artifactId>rdf.storage.sparql</artifactId>
+ <version>0.1-SNAPSHOT</version>
+ <packaging>bundle</packaging>
+ <name>Clerezza - SCB Sparql Storage Provider</name>
+ <description>A storage provider backed by a SPARQL endpoint.</description>
+ <dependencies>
+ <dependency>
+ <groupId>org.osgi</groupId>
+ <artifactId>org.osgi.compendium</artifactId>
+ </dependency>
+ <dependency>
+ <groupId>org.osgi</groupId>
+ <artifactId>org.osgi.core</artifactId>
+ </dependency>
+ <dependency>
+ <groupId>org.apache.clerezza</groupId>
+ <artifactId>rdf.ontologies</artifactId>
+ <version>0.12-SNAPSHOT</version>
+ </dependency>
+ <dependency>
+ <groupId>org.apache.clerezza</groupId>
+ <artifactId>rdf.utils</artifactId>
+ <version>0.14-SNAPSHOT</version>
+ </dependency>
+ <dependency>
+ <groupId>org.apache.clerezza</groupId>
+ <artifactId>rdf.scala.utils</artifactId>
+ <version>0.4-SNAPSHOT</version>
+ </dependency>
+ <dependency>
+ <groupId>org.apache.clerezza</groupId>
+ <artifactId>osgi.services</artifactId>
+ <version>0.2-SNAPSHOT</version>
+ </dependency>
+ <dependency>
+ <groupId>org.scala-lang</groupId>
+ <artifactId>scala-library</artifactId>
+ </dependency>
+ <dependency>
+ <groupId>javax.ws.rs</groupId>
+ <artifactId>jsr311-api</artifactId>
+ </dependency>
+ <dependency>
+ <groupId>org.apache.felix</groupId>
+ <artifactId>org.apache.felix.scr.annotations</artifactId>
+ <version>1.9.6</version>
+ </dependency>
+ <dependency>
+ <groupId>org.apache.clerezza.ext</groupId>
+ <artifactId>slf4j-scala-api</artifactId>
+ <version>1.6.3-SNAPSHOT</version>
+ </dependency>
+ </dependencies>
+ <build>
+ <sourceDirectory>src/main/scala</sourceDirectory>
+ <testSourceDirectory>src/test/scala</testSourceDirectory>
+ <plugins>
+ <plugin>
+ <groupId>org.apache.felix</groupId>
+ <artifactId>maven-bundle-plugin</artifactId>
+ <version>2.4.0</version>
+ <extensions>true</extensions>
+ <configuration>
+ <instructions>
+ <Import-Package>org.osgi.*; version="[1,2)",javax.ws.rs.*; version="[1,3)",
+ org.apache.stanbol.commons.security.*; version="[0,3)",
+ !org.apache.felix.scr.annotations.*,*</Import-Package>
+ <Bundle-SymbolicName>${project.groupId}.${project.artifactId}</Bundle-SymbolicName>
+ <_nodefaultversion />
+ </instructions>
+ </configuration>
+ </plugin>
+ <plugin>
+ <groupId>org.apache.felix</groupId>
+ <artifactId>maven-scr-plugin</artifactId>
+ <version>1.14.0</version>
+ <executions>
+ <execution>
+ <id>generate-scr-scrdescriptor</id>
+ <goals>
+ <goal>scr</goal>
+ </goals>
+ </execution>
+ </executions>
+ <configuration>
+ <scanClasses>true</scanClasses>
+ </configuration>
+ </plugin>
+ <plugin>
+ <groupId>org.scala-tools</groupId>
+ <artifactId>maven-scala-plugin</artifactId>
+ </plugin>
+ </plugins>
+ </build>
+</project>
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/clerezza/blob/ea6a70ce/rdf.storage.sparql/src/main/scala/org/apache/clerezza/rdf/storage/sparql/SparqlStorageProvider.scala
----------------------------------------------------------------------
diff --git a/rdf.storage.sparql/src/main/scala/org/apache/clerezza/rdf/storage/sparql/SparqlStorageProvider.scala b/rdf.storage.sparql/src/main/scala/org/apache/clerezza/rdf/storage/sparql/SparqlStorageProvider.scala
new file mode 100644
index 0000000..14b006e
--- /dev/null
+++ b/rdf.storage.sparql/src/main/scala/org/apache/clerezza/rdf/storage/sparql/SparqlStorageProvider.scala
@@ -0,0 +1,252 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.clerezza.rdf.storage.sparql
+
+import org.osgi.service.component.ComponentContext
+import java.io.IOException
+import java.net.{ HttpURLConnection, URL }
+import org.apache.clerezza.rdf.core.serializedform.SupportedFormat
+import org.apache.clerezza.rdf.core.serializedform.Parser
+import java.security.PrivilegedActionException
+import org.slf4j.scala._
+import org.apache.clerezza.rdf.core.access._
+import org.apache.clerezza.rdf.core.impl.AbstractMGraph
+import org.apache.clerezza.rdf.core._
+import scala.collection.JavaConversions.asScalaSet
+import java.util.Collection
+import java.util.Collections
+import org.apache.felix.scr.annotations.Component
+import org.apache.felix.scr.annotations.Service
+import org.apache.felix.scr.annotations.Property
+import java.net.URLEncoder
+import org.apache.clerezza.rdf.core.impl.TripleImpl
+import org.apache.clerezza.rdf.ontologies.RDF
+
+/**
+ * The Web Proxy Service enables applications to request remote (and local) graphs.
+ * It keeps cached version of the remote graphs in store for faster delivery.
+ *
+ */
+@Component
+@Service(Array(classOf[WeightedTcProvider]))
+class SparqlStorageProvider extends WeightedTcProvider with Logging {
+
+ final val queryEndpointKey = "query-endpoint"
+ @Property(name = queryEndpointKey, value = Array("http://localhost:3030/ds/query"))
+ private var queryEndpoint: String = _
+
+ final val updateEndpointKey = "update-endpoint"
+ @Property(name = updateEndpointKey, value = Array("http://localhost:3030/ds/update"))
+ private var updateEndpoint: String = _
+
+ final val metaGraphName = new UriRef("urn:x-internal:/meta")
+ final val mGraphClass = new UriRef("http://clerezza.apache.org/ontologies/storage#MGraph")
+
+ /**OSGI method, called on activation */
+ protected def activate(context: ComponentContext) = {
+ queryEndpoint = context.getProperties.get(queryEndpointKey).toString
+ updateEndpoint = context.getProperties.get(updateEndpointKey).toString
+ }
+
+ private var parser: Parser = null
+
+ protected def bindParser(p: Parser) = {
+ parser = p
+ }
+
+ protected def unbindParser(p: Parser) = {
+ parser = null
+ }
+
+ def getWeight: Int = {
+ return 20000
+ }
+
+ def getMGraph(name: UriRef): MGraph = {
+ checkMGraphExists(name)
+ getMGraphNoExistenceCheck(name)
+ }
+
+ /**
+ * throws NoSuchEntity if not existing
+ */
+ protected def checkMGraphExists(name: UriRef) {
+ val metaGraph = getMGraphNoExistenceCheck(metaGraphName)
+ if (!metaGraph.contains(new TripleImpl(name, RDF.`type`, mGraphClass))) {
+ throw new NoSuchEntityException(name)
+ }
+ }
+
+ protected def getMGraphNoExistenceCheck(name: UriRef): MGraph = {
+ return new AbstractMGraph() {
+ protected def performFilter(subject: NonLiteral, predicate: UriRef, obj: Resource): java.util.Iterator[Triple] = {
+ def ask = {
+ //TODO ask query
+ true
+ }
+
+ val vars = new collection.mutable.ListBuffer[Char]
+ if (subject == null) vars += 's'
+ if (predicate == null) vars += 'p'
+ if (obj == null) vars += 'o'
+ if (vars.isEmpty() && ask()) {
+ Collections.singletonList(new TripleImpl(subject, predicate, obj)).iterator()
+ } else {
+ val vs = vars.foldLeft[String]("")(((s,v) => s+" ?"+v+" "))
+ val query = "SELECT "+vs+" WHERE {" + SparqlStorageProvider.tpEncode(subject) +
+ " " + SparqlStorageProvider.tpEncode(predicate) + " " + SparqlStorageProvider.tpEncode(obj) + " } "
+ val url = new URL(queryEndpoint)
+ val con = url.openConnection().asInstanceOf[HttpURLConnection]
+ //not sure
+ System.out.println("DEBUG: doing output...")
+ con.setDoOutput(true)
+ con.setRequestMethod("POST")
+ val out = con.getOutputStream()
+ System.out.println("update: " + update)
+ out.write(("update=" + URLEncoder.encode(update)).getBytes())
+ val err = con.getErrorStream()
+ if (err != null) {
+ var che = err.read
+ while (che != -1) {
+ System.out.write(che)
+ che = err.read
+ }
+ } else {
+ val in = con.getInputStream()
+ var ch = in.read
+ while (ch != -1) {
+ System.out.write(ch)
+ ch = in.read
+ }
+ }
+ System.out.flush
+ Collections.emptyList[Triple]().iterator()
+ }
+ }
+ override def add(triple: Triple) = {
+ val update = "INSERT DATA { GRAPH " + name + " {" + SparqlStorageProvider.tpEncode(triple.getSubject) +
+ " " + SparqlStorageProvider.tpEncode(triple.getPredicate) + " " + SparqlStorageProvider.tpEncode(triple.getObject) + " } }"
+ performUpdate(update)
+ true
+ }
+
+ def size = 0
+ }
+ }
+
+ protected def performUpdate(update: String) {
+ val url = new URL(updateEndpoint)
+ val con = url.openConnection().asInstanceOf[HttpURLConnection]
+ //not sure
+ System.out.println("DEBUG: doing output...")
+ con.setDoOutput(true)
+ con.setRequestMethod("POST")
+ val out = con.getOutputStream()
+ System.out.println("update: " + update)
+ out.write(("update=" + URLEncoder.encode(update)).getBytes())
+ val err = con.getErrorStream()
+ if (err != null) {
+ var che = err.read
+ while (che != -1) {
+ System.out.write(che)
+ che = err.read
+ }
+ } else {
+ val in = con.getInputStream()
+ var ch = in.read
+ while (ch != -1) {
+ System.out.write(ch)
+ ch = in.read
+ }
+ }
+ System.out.flush
+ }
+
+ def getGraph(name: UriRef): Graph = {
+ throw new NoSuchEntityException(name)
+ }
+
+ def getTriples(name: UriRef): TripleCollection = {
+ return getMGraph(name)
+ }
+
+ def createMGraph(name: UriRef): MGraph = {
+ performUpdate("CREATE GRAPH " + name)
+ val metaGraph = getMGraphNoExistenceCheck(metaGraphName)
+ metaGraph.add(new TripleImpl(name, RDF.`type`, mGraphClass))
+ getMGraph(name)
+ }
+
+ def createGraph(name: UriRef, triples: TripleCollection): Graph = {
+ throw new UnsupportedOperationException
+ }
+
+ def deleteTripleCollection(name: UriRef): Unit = {
+ throw new UnsupportedOperationException
+ }
+
+ def getNames(graph: Graph): java.util.Set[UriRef] = {
+ return java.util.Collections.emptySet[UriRef]
+ }
+
+ def listTripleCollections: java.util.Set[UriRef] = {
+ var result: java.util.Set[UriRef] = new java.util.HashSet[UriRef]
+ result.addAll(listGraphs)
+ result.addAll(listMGraphs)
+ return result
+ }
+
+ def listGraphs: java.util.Set[UriRef] = {
+ //or should we list graphs for which we have a cached version?
+ return java.util.Collections.emptySet[UriRef]
+ }
+
+ def listMGraphs: java.util.Set[UriRef] = {
+ var result: java.util.Set[UriRef] = new java.util.HashSet[UriRef]
+ result.add(new UriRef("http://fake/sparql"))
+ result.add(new UriRef(queryEndpoint))
+ result.add(new UriRef(updateEndpoint))
+ return result
+
+ }
+}
+object SparqlStorageProvider {
+ private def tpEncode(res: Resource): String =
+ res match {
+ case l: Literal => tpEncode(l)
+ case u: UriRef => u.toString()
+ case b: BNode => tpEncode(b)
+ }
+
+ private def tpEncode(lit: Literal): String =
+ lit match {
+ case l: PlainLiteral if (l.getLanguage() == null) => "\"\"\"" + l.getLexicalForm() + "\"\"\""
+ case l: PlainLiteral if (l.getLanguage() != null) => "\"\"\"" + l.getLexicalForm() + "\"\"\"@" + l.getLanguage()
+ case l: TypedLiteral => "\"\"\"" + l.getLexicalForm() + "\"\"\"^^" + l.getDataType()
+ }
+
+ private def tpEncode(bNode: BNode): String =
+ //if the bNode has previously been retuned by SPARQL we should add
+ //TriplePatterns so that the right one is identified
+ //If this is one that is newly added we must make sure the subsequentyl added
+ //statements get added, as long as a newly added bNode doesn't add
+ //new information (would cause a non-lean graph) it is not added to the graph
+ "_:"
+}