Example from Didier that uses SCR.
git-svn-id: https://svn.apache.org/repos/asf/incubator/felix/trunk@430375 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/examples/spellcheckscr/pom.xml b/examples/spellcheckscr/pom.xml
new file mode 100644
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--- /dev/null
+++ b/examples/spellcheckscr/pom.xml
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+<project>
+ <parent>
+ <groupId>org.apache.felix</groupId>
+ <artifactId>felix</artifactId>
+ <version>0.8.0-SNAPSHOT</version>
+ </parent>
+ <modelVersion>4.0.0</modelVersion>
+ <packaging>osgi-bundle</packaging>
+ <name>Apache Felix Examples: Spell Check w/ SCR</name>
+ <artifactId>org.apache.felix.examples.spellcheckscr</artifactId>
+ <dependencies>
+ <dependency>
+ <groupId>${pom.groupId}</groupId>
+ <artifactId>org.osgi.core</artifactId>
+ <version>${pom.version}</version>
+ <scope>provided</scope>
+ </dependency>
+ <dependency>
+ <groupId>${pom.groupId}</groupId>
+ <artifactId>org.apache.felix.examples.dictionaryservice</artifactId>
+ <version>${pom.version}</version>
+ <scope>provided</scope>
+ </dependency>
+ <dependency>
+ <groupId>${pom.groupId}</groupId>
+ <artifactId>org.apache.felix.examples.spellcheckservice</artifactId>
+ <version>${pom.version}</version>
+ <scope>provided</scope>
+ </dependency>
+ <dependency>
+ <groupId>${pom.groupId}</groupId>
+ <artifactId>org.apache.felix.scr</artifactId>
+ <version>${pom.version}</version>
+ <scope>provided</scope>
+ </dependency>
+ </dependencies>
+ <build>
+ <plugins>
+ <plugin>
+ <groupId>org.apache.felix.plugins</groupId>
+ <artifactId>maven-osgi-plugin</artifactId>
+ <version>${pom.version}</version>
+ <extensions>true</extensions>
+ <configuration>
+ <osgiManifest>
+ <entries>
+ <property>
+ <name>Service-Component</name>
+ <value>OSGI-INF/component.xml</value>
+ </property>
+ </entries>
+ <bundleName>Spell Check w/ SCR Example</bundleName>
+ <bundleVendor>Apache Software Foundation</bundleVendor>
+ <bundleDescription>
+ A bundle that registers a spell checking service based on Service Component Runtime.
+ </bundleDescription>
+ <bundleActivator>
+ org.apache.felix.examples.spellcheckscr.Activator
+ </bundleActivator>
+ <importPackage>
+ org.osgi.framework, org.apache.felix.examples.dictionaryservice, org.apache.felix.scr, org.apache.felix.examples.spellcheckservice
+ </importPackage>
+ </osgiManifest>
+ </configuration>
+ </plugin>
+ </plugins>
+ </build>
+</project>
diff --git a/examples/spellcheckscr/src/main/java/org/apache/felix/examples/spellcheckscr/Activator.java b/examples/spellcheckscr/src/main/java/org/apache/felix/examples/spellcheckscr/Activator.java
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--- /dev/null
+++ b/examples/spellcheckscr/src/main/java/org/apache/felix/examples/spellcheckscr/Activator.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2006 The Apache Software Foundation
+ *
+ * Licensed 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.felix.examples.spellcheckscr;
+
+
+import org.apache.felix.scr.GenericActivator;
+
+
+/**
+ * This example re-implements the spell check service of Example 5 using the
+ * Apache Felix Service Component Runtime.
+ * The Service Component Runtime greatly simplifies creating OSGi applications
+ * by essentially eliminating the need to write OSGi-related code;
+ * instead of writing OSGi code for your bundle, you create a simple XML file to
+ * describe your bundle's service dependencies. This class extends the generic
+ * bundle activator; it does not provide any additional functionality. All
+ * functionality for service-related tasks, such as look-up and binding, is
+ * handled by the generic activator base class using data from the metadata.xml
+ * file. All application functionality is defined in the
+ * SpellCheckServiceImpl.java file.
+ *
+ * @author <a href="mailto:felix-dev@incubator.apache.org">Felix Project Team</a>
+ */
+public class Activator extends GenericActivator
+{
+}
diff --git a/examples/spellcheckscr/src/main/java/org/apache/felix/examples/spellcheckscr/SpellCheckServiceImpl.java b/examples/spellcheckscr/src/main/java/org/apache/felix/examples/spellcheckscr/SpellCheckServiceImpl.java
new file mode 100644
index 0000000..e5e4edd
--- /dev/null
+++ b/examples/spellcheckscr/src/main/java/org/apache/felix/examples/spellcheckscr/SpellCheckServiceImpl.java
@@ -0,0 +1,141 @@
+/*
+ * Copyright 2006 The Apache Software Foundation
+ *
+ * Licensed 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.felix.examples.spellcheckscr;
+
+
+import java.util.ArrayList;
+import java.util.StringTokenizer;
+
+import org.apache.felix.examples.dictionaryservice.DictionaryService;
+import org.apache.felix.examples.spellcheckservice.SpellCheckService;
+
+
+/**
+ * This class re-implements the spell check service of Example 5. This service
+ * implementation behaves exactly like the one in Example 5, specifically, it
+ * aggregates all available dictionary services, monitors their dynamic
+ * availability, and only offers the spell check service if there are dictionary
+ * services available. The service implementation is greatly simplified, though,
+ * by using the Service Component Runtime. Notice that there is no OSGi references in the
+ * application code; intead, the metadata.xml file describes the service
+ * dependencies to the Service Component Runtime, which automatically manages them and it
+ * also automatically registers the spell check services as appropriate.
+ *
+ * @author <a href="mailto:felix-dev@incubator.apache.org">Felix Project Team</a>
+ */
+public class SpellCheckServiceImpl implements SpellCheckService
+{
+ // List of service objects.
+ private ArrayList m_svcObjList = new ArrayList();
+
+
+ /**
+ * This method is used by the Service Component Runtime to add new dictionaries to the
+ * spell check service.
+ *
+ * @param dictionary
+ * the dictionary to add to the spell check service.
+ */
+ public void addDictionary( DictionaryService dictionary )
+ {
+ // Lock list and add service object.
+ synchronized ( m_svcObjList )
+ {
+ m_svcObjList.add( dictionary );
+ }
+ }
+
+
+ /**
+ * This method is used by the Service Component Runtime to remove dictionaries from the
+ * spell check service.
+ *
+ * @param dictionary
+ * the dictionary to remove from the spell check service.
+ */
+ public void removeDictionary( DictionaryService dictionary )
+ {
+ // Lock list and remove service object.
+ synchronized ( m_svcObjList )
+ {
+ m_svcObjList.remove( dictionary );
+ }
+ }
+
+
+ /**
+ * Checks a given passage for spelling errors. A passage is any number of
+ * words separated by a space and any of the following punctuation marks:
+ * comma (,), period (.), exclamation mark (!), question mark (?),
+ * semi-colon (;), and colon(:).
+ *
+ * @param passage
+ * the passage to spell check.
+ * @return An array of misspelled words or null if no words are misspelled.
+ */
+ public String[] check( String passage )
+ {
+ // No misspelled words for an empty string.
+ if ( ( passage == null ) || ( passage.length() == 0 ) )
+ {
+ return null;
+ }
+
+ ArrayList errorList = new ArrayList();
+
+ // Tokenize the passage using spaces and punctionation.
+ StringTokenizer st = new StringTokenizer( passage, " ,.!?;:" );
+
+ // Lock the service list.
+ synchronized ( m_svcObjList )
+ {
+ // Loop through each word in the passage.
+ while ( st.hasMoreTokens() )
+ {
+ String word = st.nextToken();
+ boolean correct = false;
+
+ // Check each available dictionary for the current word.
+ for ( int i = 0; ( !correct ) && ( i < m_svcObjList.size() ); i++ )
+ {
+ DictionaryService dictionary = ( DictionaryService ) m_svcObjList.get( i );
+
+ if ( dictionary.checkWord( word ) )
+ {
+ correct = true;
+ }
+ }
+
+ // If the word is not correct, then add it
+ // to the incorrect word list.
+ if ( !correct )
+ {
+ errorList.add( word );
+ }
+ }
+ }
+
+ // Return null if no words are incorrect.
+ if ( errorList.size() == 0 )
+ {
+ return null;
+ }
+
+ // Return the array of incorrect words.
+ return ( String[] ) errorList.toArray( new String[errorList.size()] );
+ }
+}
diff --git a/examples/spellcheckscr/src/main/resources/OSGI-INF/component.properties b/examples/spellcheckscr/src/main/resources/OSGI-INF/component.properties
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+++ b/examples/spellcheckscr/src/main/resources/OSGI-INF/component.properties
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+
+service.pid=org.apache.felix.examples.spellcheckscr
+# service.ranking=10
+service.vendor=Apache Software Foundation
+
+foo=bar
+tic=tac toe
+
+
diff --git a/examples/spellcheckscr/src/main/resources/OSGI-INF/component.xml b/examples/spellcheckscr/src/main/resources/OSGI-INF/component.xml
new file mode 100644
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+++ b/examples/spellcheckscr/src/main/resources/OSGI-INF/component.xml
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+<?xml version="1.0" encoding="UTF-8"?>
+<component name="spellcheckscr">
+
+ <!-- xmlns="http://www.osgi.org/xmlns/scr/v1.0.0" -->
+ <!--
+ This metadata file instructs the Apache Felix Service Component
+ Runtime to create one instance of "SpellCheckServiceImpl". It also
+ tells the generic activator that this instance implements the
+ "SpellCheckService" service interface and that it has an
+ aggregate dependency on "DictionaryService" services. Since
+ the service dependency on dictionary services has a lower
+ cardinality of one, the generic activator will create the instance
+ and offer its spell check service only when there is at least
+ one dictionary service available. The service dependency is
+ "dynamic", which means that dictionary service availability
+ will be monitored dynamically at runtime and it also tells the
+ generic activator which methods to call when adding and removing
+ dictionary services.
+ -->
+ <implementation class="org.apache.felix.examples.spellcheckscr.SpellCheckServiceImpl"/>
+
+ <property name="category" value="demo" type="String"/>
+
+ <properties entry="OSGI-INF/component.properties"/>
+
+ <service>
+ <provide interface="org.apache.felix.examples.spellcheckservice.SpellCheckService"/>
+ </service>
+
+ <reference name="DICTONARY"
+ interface="org.apache.felix.examples.dictionaryservice.DictionaryService"
+ filter="(Language=*)"
+ cardinality="1..n"
+ policy="dynamic"
+ bind="addDictionary"
+ unbind="removeDictionary"
+ />
+</component>