[HWKMETRICS-185] Port the exception mappers to JAX-RS 1.1 code.

api/metrics-api-jaxrs-1.1/src/main/java/org/hawkular/metrics/api/jaxrs/exception/mappers/BadRequestExceptionMapper.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2014-2015 Red Hat, Inc. and/or its affiliates
+ * and other contributors as indicated by the @author tags.
+ *
+ * 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.hawkular.metrics.api.jaxrs.exception.mappers;
+
+import javax.ws.rs.core.Response;
+import javax.ws.rs.ext.ExceptionMapper;
+import javax.ws.rs.ext.Provider;
+
+import org.jboss.resteasy.spi.BadRequestException;
+
+/**
+ * Exception mapper for any exception thrown by RESTEasy when HTTP Bad Request (400) is encountered.
+ * <p>
+ * This mapper let us reply to the user with a pre-determined message format if, for example, a {@link
+ * javax.ws.rs.ext.ParamConverter} throws an {@link java.lang.IllegalArgumentException}.
+ *
+ * @author Thomas Segismont
+ */
+@Provider
+public class BadRequestExceptionMapper implements ExceptionMapper<BadRequestException> {
+
+    @Override
+    public Response toResponse(BadRequestException exception) {
+        return ExceptionMapperUtils.buildResponse(exception, Response.Status.BAD_REQUEST);
+    }
+}

api/metrics-api-jaxrs-1.1/src/main/java/org/hawkular/metrics/api/jaxrs/exception/mappers/ExceptionMapperUtils.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2014-2015 Red Hat, Inc. and/or its affiliates
+ * and other contributors as indicated by the @author tags.
+ *
+ * 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.hawkular.metrics.api.jaxrs.exception.mappers;
+
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Response.Status;
+
+import org.hawkular.metrics.api.jaxrs.ApiError;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.common.base.Throwables;
+
+/**
+ * @author Jeeva Kandasamy
+ */
+public class ExceptionMapperUtils {
+    private static final Logger LOG = LoggerFactory.getLogger(ExceptionMapperUtils.class);
+    private ExceptionMapperUtils(){
+
+    }
+
+    public static Response buildResponse(Throwable exception, Status status){
+        LOG.trace("RestEasy exception,", exception);
+        return Response.status(status)
+                .entity(new ApiError(Throwables.getRootCause(exception).getMessage()))
+                .type(MediaType.APPLICATION_JSON_TYPE)
+                .build();
+    }
+}

api/metrics-api-jaxrs-1.1/src/main/java/org/hawkular/metrics/api/jaxrs/exception/mappers/NotAcceptableExceptionMapper.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2014-2015 Red Hat, Inc. and/or its affiliates
+ * and other contributors as indicated by the @author tags.
+ *
+ * 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.hawkular.metrics.api.jaxrs.exception.mappers;
+
+import javax.ws.rs.core.Response;
+import javax.ws.rs.ext.ExceptionMapper;
+import javax.ws.rs.ext.Provider;
+
+import org.jboss.resteasy.spi.NotAcceptableException;
+
+/**
+ * Exception mapper for any exception thrown by RESTEasy when HTTP Not Acceptable (406) is encountered.
+ * <p>
+ * This mapper let us reply to the user with a pre-determined message format if, for example, receive a
+ * HTTP GET request with unsupported media type.
+ *
+ * @author Jeeva Kandasamy
+ */
+@Provider
+public class NotAcceptableExceptionMapper implements ExceptionMapper<NotAcceptableException> {
+
+    @Override
+    public Response toResponse(NotAcceptableException exception) {
+        return ExceptionMapperUtils.buildResponse(exception, Response.Status.NOT_ACCEPTABLE);
+    }
+
+}

api/metrics-api-jaxrs-1.1/src/main/java/org/hawkular/metrics/api/jaxrs/exception/mappers/NotAllowedExceptionMapper.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2014-2015 Red Hat, Inc. and/or its affiliates
+ * and other contributors as indicated by the @author tags.
+ *
+ * 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.hawkular.metrics.api.jaxrs.exception.mappers;
+
+import javax.ws.rs.core.Response;
+import javax.ws.rs.ext.ExceptionMapper;
+import javax.ws.rs.ext.Provider;
+
+import org.jboss.resteasy.spi.MethodNotAllowedException;
+
+/**
+ * Exception mapper for any exception thrown by RESTEasy when HTTP Method Not Allowed (405) is encountered.
+ * <p>
+ * This mapper let us reply to the user with a pre-determined message format if, for example, receive
+ * a HTTP POST request for a resource which does not support for HTTP POST method.
+ *
+ * @author Jeeva Kandasamy
+ */
+@Provider
+public class NotAllowedExceptionMapper implements ExceptionMapper<MethodNotAllowedException> {
+
+    @Override
+    public Response toResponse(MethodNotAllowedException exception) {
+        return ExceptionMapperUtils.buildResponse(exception, Response.Status.BAD_REQUEST);
+    }
+
+}

api/metrics-api-jaxrs-1.1/src/main/java/org/hawkular/metrics/api/jaxrs/exception/mappers/NotFoundExceptionMapper.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2014-2015 Red Hat, Inc. and/or its affiliates
+ * and other contributors as indicated by the @author tags.
+ *
+ * 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.hawkular.metrics.api.jaxrs.exception.mappers;
+
+import javax.ws.rs.core.Response;
+import javax.ws.rs.ext.ExceptionMapper;
+import javax.ws.rs.ext.Provider;
+
+import org.jboss.resteasy.spi.NotFoundException;
+
+/**
+ * Exception mapper for any exception thrown by RESTEasy when HTTP Not Found (404) is encountered.
+ * Also checks the case chain, if NumberFormatException is present building response with HTTP Bad Request (400).
+ * <p>
+ * This mapper let us reply to the user with a pre-determined message format if, for example, receive
+ * a request for unavailable resource.
+ *
+ * @author Jeeva Kandasamy
+ */
+@Provider
+public class NotFoundExceptionMapper implements ExceptionMapper<NotFoundException> {
+
+    @Override
+    public Response toResponse(NotFoundException exception) {
+        if (exception.getCause() instanceof NumberFormatException) {
+            return ExceptionMapperUtils.buildResponse(exception, Response.Status.BAD_REQUEST);
+        } else {
+            return ExceptionMapperUtils.buildResponse(exception, Response.Status.NOT_FOUND);
+        }
+    }
+
+}

api/metrics-api-jaxrs-1.1/src/main/java/org/hawkular/metrics/api/jaxrs/exception/mappers/ReaderExceptionMapper.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2014-2015 Red Hat, Inc. and/or its affiliates
+ * and other contributors as indicated by the @author tags.
+ *
+ * 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.hawkular.metrics.api.jaxrs.exception.mappers;
+
+import javax.ws.rs.core.Response;
+import javax.ws.rs.ext.ExceptionMapper;
+import javax.ws.rs.ext.Provider;
+
+import org.hawkular.metrics.api.jaxrs.interceptor.EmptyPayloadException;
+import org.hawkular.metrics.api.jaxrs.util.ApiUtils;
+import org.jboss.resteasy.spi.ReaderException;
+
+import com.google.common.base.Throwables;
+
+/**
+ * Exception mapper for any exception thrown by a body reader chain.
+ * <p>
+ * This mapper let us reply to the user with a pre-determined message format if, for example, a JSON entity cannot be
+ * parsed.
+ *
+ * @author Thomas Segismont
+ */
+@Provider
+public class ReaderExceptionMapper implements ExceptionMapper<ReaderException> {
+
+    @Override
+    public Response toResponse(ReaderException exception) {
+        Throwable rootCause = Throwables.getRootCause(exception);
+        if (rootCause instanceof EmptyPayloadException) {
+            return ApiUtils.emptyPayload();
+        }
+        return ExceptionMapperUtils.buildResponse(rootCause, Response.Status.BAD_REQUEST);
+    }
+}