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Diffstat (limited to 'sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator')
-rw-r--r--sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/AddService.java28
-rw-r--r--sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/AddServiceImpl.java36
-rw-r--r--sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/CalculatorActivator.java54
-rw-r--r--sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/CalculatorService.java66
-rw-r--r--sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/CalculatorServiceImpl.java88
-rw-r--r--sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/DivideService.java28
-rw-r--r--sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/DivideServiceImpl.java35
-rw-r--r--sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/MultiplyService.java28
-rw-r--r--sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/MultiplyServiceImpl.java35
-rw-r--r--sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/SubtractService.java28
-rw-r--r--sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/SubtractServiceImpl.java35
11 files changed, 461 insertions, 0 deletions
diff --git a/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/AddService.java b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/AddService.java
new file mode 100644
index 0000000000..188451ebac
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/AddService.java
@@ -0,0 +1,28 @@
+/*
+ * 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 calculator;
+
+/**
+ * The Add service interface
+ */
+public interface AddService {
+
+ double add(double n1, double n2);
+
+}
diff --git a/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/AddServiceImpl.java b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/AddServiceImpl.java
new file mode 100644
index 0000000000..193a7d6636
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/AddServiceImpl.java
@@ -0,0 +1,36 @@
+/*
+ * 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 calculator;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * An implementation of the Add service
+ */
+public class AddServiceImpl implements AddService {
+
+ public double add(double n1, double n2) {
+ Logger logger = Logger.getLogger("calculator");
+ logger.log(Level.FINEST, "Adding " + n1 + " and " + n2);
+
+ return n1 + n2;
+ }
+
+}
diff --git a/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/CalculatorActivator.java b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/CalculatorActivator.java
new file mode 100644
index 0000000000..4408568629
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/CalculatorActivator.java
@@ -0,0 +1,54 @@
+/*
+ * 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 calculator;
+
+import org.apache.tuscany.sca.node.Contribution;
+import org.apache.tuscany.sca.node.ContributionLocationHelper;
+import org.apache.tuscany.sca.node.Node;
+import org.apache.tuscany.sca.node.NodeFactory;
+import org.osgi.framework.BundleActivator;
+import org.osgi.framework.BundleContext;
+
+/**
+ * Bundle Activator for Calculator
+ *
+ */
+public class CalculatorActivator implements BundleActivator {
+ private Node node;
+
+ public void start(BundleContext context) throws Exception {
+ try {
+ NodeFactory factory = NodeFactory.newInstance();
+ String url = ContributionLocationHelper.getContributionLocation(getClass());
+ Contribution contrib = new Contribution("c1", url);
+ node = factory.createNode("Calculator.composite", contrib);
+ node.start();
+ } catch (Throwable e) {
+ e.printStackTrace();
+ }
+ }
+
+ public void stop(BundleContext context) throws Exception {
+ if (node != null) {
+ node.stop();
+ node = null;
+ }
+ }
+
+}
diff --git a/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/CalculatorService.java b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/CalculatorService.java
new file mode 100644
index 0000000000..2d14bbd49f
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/CalculatorService.java
@@ -0,0 +1,66 @@
+/*
+ * 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 calculator;
+
+import javax.ws.rs.Consumes;
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+
+import org.oasisopen.sca.annotation.Remotable;
+
+/**
+ * The Calculator service interface.
+ */
+@Remotable
+public interface CalculatorService {
+
+ @GET
+ @Path("add/{n1}/{n2}")
+ @Consumes(MediaType.TEXT_PLAIN)
+ @Produces(MediaType.TEXT_PLAIN)
+ String add(@PathParam("n1") String n1, @PathParam("n2") String n2);
+
+ @GET
+ @Path("subtract/{n1}/{n2}")
+ @Consumes(MediaType.TEXT_PLAIN)
+ @Produces(MediaType.TEXT_PLAIN)
+ String subtract(@PathParam("n1") String n1, @PathParam("n2") String n2);
+
+ @GET
+ @Path("multiply/{n1}/{n2}")
+ @Consumes(MediaType.TEXT_PLAIN)
+ @Produces(MediaType.TEXT_PLAIN)
+ String multiply(@PathParam("n1") String n1, @PathParam("n2") String n2);
+
+ @GET
+ @Path("divide/{n1}/{n2}")
+ @Consumes(MediaType.TEXT_PLAIN)
+ @Produces(MediaType.TEXT_PLAIN)
+ String divide(@PathParam("n1") String n1, @PathParam("n2") String n2);
+
+ @GET
+ @Path("calculate/{formula}")
+ @Consumes(MediaType.TEXT_PLAIN)
+ @Produces(MediaType.TEXT_PLAIN)
+ String calculate(@PathParam("formula") String formula);
+
+}
diff --git a/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/CalculatorServiceImpl.java b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/CalculatorServiceImpl.java
new file mode 100644
index 0000000000..55aabdb56f
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/CalculatorServiceImpl.java
@@ -0,0 +1,88 @@
+/*
+ * 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 calculator;
+
+import org.oasisopen.sca.annotation.Reference;
+
+/**
+ * An implementation of the Calculator service.
+ */
+public class CalculatorServiceImpl implements CalculatorService {
+
+ private AddService addService;
+ private SubtractService subtractService;
+ private MultiplyService multiplyService;
+ private DivideService divideService;
+
+ @Reference
+ public void setAddService(AddService addService) {
+ this.addService = addService;
+ }
+
+ @Reference
+ public void setSubtractService(SubtractService subtractService) {
+ this.subtractService = subtractService;
+ }
+
+ @Reference
+ public void setDivideService(DivideService divideService) {
+ this.divideService = divideService;
+ }
+
+ @Reference
+ public void setMultiplyService(MultiplyService multiplyService) {
+ this.multiplyService = multiplyService;
+ }
+
+ public String add(String n1, String n2) {
+ //System.out.println("ADD Operation ==> " + n1 + " + " + n2 + " = " + addService.add(Double.parseDouble(n1), Double.parseDouble(n2)));
+ return String.valueOf(addService.add(Double.parseDouble(n1), Double.parseDouble(n2)));
+ }
+
+ public String subtract(String n1, String n2) {
+ //System.out.println("SUBTRACT Operation ==> " + n1 + " + " + n2 + " = " + subtractService.subtract(Double.parseDouble(n1), Double.parseDouble(n2)));
+ return String.valueOf(subtractService.subtract(Double.parseDouble(n1), Double.parseDouble(n2)));
+ }
+
+ public String multiply(String n1, String n2) {
+ //System.out.println("MULTIPLY Operation ==> " + n1 + " + " + n2 + " = " + multiplyService.multiply(Double.parseDouble(n1), Double.parseDouble(n2)));
+ return String.valueOf(multiplyService.multiply(Double.parseDouble(n1), Double.parseDouble(n2)));
+ }
+
+ public String divide(String n1, String n2) {
+ //System.out.println("DIVIDE Operation ==> " + n1 + " + " + n2 + " = " + divideService.divide(Double.parseDouble(n1), Double.parseDouble(n2)));
+ return String.valueOf(divideService.divide(Double.parseDouble(n1), Double.parseDouble(n2)));
+ }
+
+ public String calculate(String formula) {
+ String[] operands = formula.split("[\\+\\-\\*\\:]");
+ if(formula.contains("+")) {
+ return add( operands[0], operands[1]);
+ } else if(formula.contains("-")) {
+ return subtract( operands[0], operands[1]);
+ } else if(formula.contains("*")) {
+ return multiply( operands[0], operands[1]);
+ } else if(formula.contains(":")) {
+ return divide( operands[0], operands[1]);
+ } else {
+ throw new IllegalArgumentException("Invalid formula: " + formula );
+ }
+ }
+
+}
diff --git a/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/DivideService.java b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/DivideService.java
new file mode 100644
index 0000000000..30d248208b
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/DivideService.java
@@ -0,0 +1,28 @@
+/*
+ * 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 calculator;
+
+/**
+ * The divide service interface
+ */
+public interface DivideService {
+
+ double divide(double n1, double n2);
+
+}
diff --git a/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/DivideServiceImpl.java b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/DivideServiceImpl.java
new file mode 100644
index 0000000000..1323edf55a
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/DivideServiceImpl.java
@@ -0,0 +1,35 @@
+/*
+ * 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 calculator;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * An implementation of the Divide service.
+ */
+public class DivideServiceImpl implements DivideService {
+
+ public double divide(double n1, double n2) {
+ Logger logger = Logger.getLogger("calculator");
+ logger.log(Level.FINEST, "Dividing " + n1 + " with " + n2);
+ return n1 / n2;
+ }
+
+}
diff --git a/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/MultiplyService.java b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/MultiplyService.java
new file mode 100644
index 0000000000..5290605938
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/MultiplyService.java
@@ -0,0 +1,28 @@
+/*
+ * 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 calculator;
+
+/**
+ * The interface for the multiply service
+ */
+public interface MultiplyService {
+
+ double multiply(double n1, double n2);
+
+}
diff --git a/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/MultiplyServiceImpl.java b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/MultiplyServiceImpl.java
new file mode 100644
index 0000000000..91b803bc9e
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/MultiplyServiceImpl.java
@@ -0,0 +1,35 @@
+/*
+ * 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 calculator;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * An implementation of the Multiply service.
+ */
+public class MultiplyServiceImpl implements MultiplyService {
+
+ public double multiply(double n1, double n2) {
+ Logger logger = Logger.getLogger("calculator");
+ logger.log(Level.FINEST, "Multiplying " + n1 + " with " + n2);
+ return n1 * n2;
+ }
+
+}
diff --git a/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/SubtractService.java b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/SubtractService.java
new file mode 100644
index 0000000000..bf0d1882b6
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/SubtractService.java
@@ -0,0 +1,28 @@
+/*
+ * 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 calculator;
+
+/**
+ * The interface for the multiply service
+ */
+public interface SubtractService {
+
+ double subtract(double n1, double n2);
+
+}
diff --git a/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/SubtractServiceImpl.java b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/SubtractServiceImpl.java
new file mode 100644
index 0000000000..58cc4a3547
--- /dev/null
+++ b/sandbox/sebastien/java/vhost/samples/running-tuscany/maven-osgi-junit/calculator-rest-osgi/src/main/java/calculator/SubtractServiceImpl.java
@@ -0,0 +1,35 @@
+/*
+ * 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 calculator;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * An implementation of the subtract service.
+ */
+public class SubtractServiceImpl implements SubtractService {
+
+ public double subtract(double n1, double n2) {
+ Logger logger = Logger.getLogger("calculator");
+ logger.log(Level.FINEST, "Subtracting " + n1 + " from " + n2);
+ return n1 - n2;
+ }
+
+}