Add start and parameter handling

Add startup code, command line parsing, service
start, and parameter handling for the policy distribution service.

Issue-ID: POLICY-922
Change-Id: Ie664aba6541304cf9b635541e9688c681b24952d
Signed-off-by: liamfallon <liam.fallon@ericsson.com>

4 files changed, 243 insertions, 0 deletions

diff --git a/main/src/test/java/org/onap/policy/distribution/main/TestExceptions.java b/main/src/test/java/org/onap/policy/distribution/main/TestExceptions.java
new file mode 100644
index 00000000..b3140978
--- /dev/null
+++ b/main/src/test/java/org/onap/policy/distribution/main/TestExceptions.java
@@ -0,0 +1,39 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * 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.
+ * 
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.distribution.main;
+
+import static org.junit.Assert.assertNotNull;
+
+import java.io.IOException;
+
+import org.junit.Test;
+
+public class TestExceptions {
+
+    @Test
+    public void test() {
+        assertNotNull(new PolicyDistributionException("Message"));
+        assertNotNull(new PolicyDistributionException("Message", new IOException()));
+        
+        assertNotNull(new PolicyDistributionRuntimeException("Message"));
+        assertNotNull(new PolicyDistributionRuntimeException("Message", new IOException()));
+    }
+}
diff --git a/main/src/test/java/org/onap/policy/distribution/main/parameters/TestParameterGroup.java b/main/src/test/java/org/onap/policy/distribution/main/parameters/TestParameterGroup.java
new file mode 100644
index 00000000..bf553918
--- /dev/null
+++ b/main/src/test/java/org/onap/policy/distribution/main/parameters/TestParameterGroup.java
@@ -0,0 +1,46 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * 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.
+ * 
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.distribution.main.parameters;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+public class TestParameterGroup {
+
+    @Test
+    public void testParameterGroup() {
+        DistributionParameterGroup parameterGroup = new DistributionParameterGroup("groupName");
+        assertEquals("groupName", parameterGroup.getName());
+        assertTrue(parameterGroup.isValid());
+        
+        parameterGroup = new DistributionParameterGroup(null);
+        assertNull(parameterGroup.getName());
+        assertFalse(parameterGroup.isValid());
+        
+        parameterGroup = new DistributionParameterGroup("");
+        assertEquals("", parameterGroup.getName());
+        assertFalse(parameterGroup.isValid());
+    }
+}
diff --git a/main/src/test/java/org/onap/policy/distribution/main/parameters/TestParameterHandler.java b/main/src/test/java/org/onap/policy/distribution/main/parameters/TestParameterHandler.java
new file mode 100644
index 00000000..5b938988
--- /dev/null
+++ b/main/src/test/java/org/onap/policy/distribution/main/parameters/TestParameterHandler.java
@@ -0,0 +1,127 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * 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.
+ * 
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.distribution.main.parameters;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
+import org.junit.Test;
+import org.onap.policy.distribution.main.PolicyDistributionException;
+import org.onap.policy.distribution.main.startstop.DistributionCommandLineArguments;
+
+public class TestParameterHandler {
+    @Test
+    public void testParameterHandlerNoParameterFile() throws PolicyDistributionException {
+        String[] noArgumentString = { "-c", "parameters/NoParameterFile.json" };
+
+        DistributionCommandLineArguments noArguments = new DistributionCommandLineArguments();
+        noArguments.parse(noArgumentString);
+
+        try {
+            new DistributionParameterHandler().getParameters(noArguments);
+            fail("test should throw an exception here");
+        } catch (Exception e) {
+            assertEquals("error reading parameters from \"parameters/NoParameterFile.json\"\n"
+                            + "(FileNotFoundException):parameters/NoParameterFile.json (No such file or directory)",
+                            e.getMessage());
+        }
+    }
+
+    @Test
+    public void testParameterHandlerEmptyParameters() throws PolicyDistributionException {
+        String[] emptyArgumentString = { "-c", "parameters/EmptyParameters.json" };
+
+        DistributionCommandLineArguments emptyArguments = new DistributionCommandLineArguments();
+        emptyArguments.parse(emptyArgumentString);
+
+        try {
+            new DistributionParameterHandler().getParameters(emptyArguments);
+            fail("test should throw an exception here");
+        } catch (Exception e) {
+            assertEquals("no parameters found in \"parameters/EmptyParameters.json\"", e.getMessage());
+        }
+    }
+
+    @Test
+    public void testParameterHandlerBadParameters() throws PolicyDistributionException {
+        String[] badArgumentString = { "-c", "parameters/BadParameters.json" };
+
+        DistributionCommandLineArguments badArguments = new DistributionCommandLineArguments();
+        badArguments.parse(badArgumentString);
+
+        try {
+            new DistributionParameterHandler().getParameters(badArguments);
+            fail("test should throw an exception here");
+        } catch (Exception e) {
+            assertEquals("error reading parameters from \"parameters/BadParameters.json\"\n"
+                            + "(JsonSyntaxException):java.lang.IllegalStateException: "
+                            + "Expected a string but was BEGIN_ARRAY at line 2 column 15 path $.name", e.getMessage());
+        }
+    }
+
+    @Test
+    public void testParameterHandlerInvalidParameters() throws PolicyDistributionException {
+        String[] invalidArgumentString = { "-c", "parameters/InvalidParameters.json" };
+
+        DistributionCommandLineArguments invalidArguments = new DistributionCommandLineArguments();
+        invalidArguments.parse(invalidArgumentString);
+
+        try {
+            new DistributionParameterHandler().getParameters(invalidArguments);
+            fail("test should throw an exception here");
+        } catch (Exception e) {
+            assertEquals("error reading parameters from \"parameters/InvalidParameters.json\"\n"
+                            + "(JsonSyntaxException):java.lang.IllegalStateException: "
+                            + "Expected a string but was BEGIN_ARRAY at line 2 column 15 path $.name", e.getMessage());
+        }
+    }
+
+    @Test
+    public void testParameterHandlerNoParameters() throws PolicyDistributionException {
+        String[] noArgumentString = { "-c", "parameters/NoParameters.json" };
+
+        DistributionCommandLineArguments noArguments = new DistributionCommandLineArguments();
+        noArguments.parse(noArgumentString);
+
+        try {
+            new DistributionParameterHandler().getParameters(noArguments);
+            fail("test should throw an exception here");
+        } catch (Exception e) {
+            assertEquals("validation error(s) on parameters from \"parameters/NoParameters.json\"\n"
+                            + "parameter group \"null\" type "
+                            + "\"org.onap.policy.distribution.main.parameters.DistributionParameterGroup\""
+                            + " INVALID, parameter group has status INVALID\n"
+                            + "  field \"name\" type \"java.lang.String\" value \"null\" INVALID, must be a non-blank string\n",
+                            e.getMessage());
+        }
+    }
+
+    @Test
+    public void testParameterHandlerMinumumParameters() throws PolicyDistributionException {
+        String[] minArgumentString = { "-c", "parameters/MinimumParameters.json" };
+
+        DistributionCommandLineArguments minArguments = new DistributionCommandLineArguments();
+        minArguments.parse(minArgumentString);
+
+        DistributionParameterGroup parGroup = new DistributionParameterHandler().getParameters(minArguments);
+        assertEquals("nameFromFile", parGroup.getName());
+    }
+}
diff --git a/main/src/test/java/org/onap/policy/distribution/main/startstop/TestMain.java b/main/src/test/java/org/onap/policy/distribution/main/startstop/TestMain.java
new file mode 100644
index 00000000..781a2ab8
--- /dev/null
+++ b/main/src/test/java/org/onap/policy/distribution/main/startstop/TestMain.java
@@ -0,0 +1,31 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * 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.
+ * 
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.distribution.main.startstop;
+
+import org.junit.Test;
+
+public class TestMain {
+
+    @Test
+    public void testMain() {
+        Main.main(null);
+    }
+}