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authorRam Krishna Verma <ram_krishna.verma@bell.ca>2020-02-24 14:38:07 +0000
committerGerrit Code Review <gerrit@onap.org>2020-02-24 14:38:07 +0000
commit0c200b611ee7d56753915281f9a168f7f6e00e7e (patch)
tree79e63973201b6c0a97bf8b907be9b1c423088710 /services
parent8f8df7ee1ddb20b03cedb17dccdc79fc291cc678 (diff)
parentffe99e4b5c10956ed05c8cd11c8a3fca78427cbb (diff)
Merge "remove code duplication in plugin-event-carrier"
Diffstat (limited to 'services')
-rw-r--r--services/services-engine/src/main/java/org/onap/policy/apex/service/parameters/carriertechnology/RestPluginCarrierTechnologyParameters.java277
1 files changed, 277 insertions, 0 deletions
diff --git a/services/services-engine/src/main/java/org/onap/policy/apex/service/parameters/carriertechnology/RestPluginCarrierTechnologyParameters.java b/services/services-engine/src/main/java/org/onap/policy/apex/service/parameters/carriertechnology/RestPluginCarrierTechnologyParameters.java
new file mode 100644
index 000000000..f548f636a
--- /dev/null
+++ b/services/services-engine/src/main/java/org/onap/policy/apex/service/parameters/carriertechnology/RestPluginCarrierTechnologyParameters.java
@@ -0,0 +1,277 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * Modifications Copyright (C) 2019 Nordix 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.service.parameters.carriertechnology;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.regex.PatternSyntaxException;
+
+import javax.ws.rs.core.MultivaluedHashMap;
+import javax.ws.rs.core.MultivaluedMap;
+
+import lombok.Getter;
+import lombok.Setter;
+import org.apache.commons.lang3.StringUtils;
+import org.onap.policy.apex.service.parameters.carriertechnology.CarrierTechnologyParameters;
+import org.onap.policy.common.parameters.GroupValidationResult;
+import org.onap.policy.common.parameters.ValidationStatus;
+import org.onap.policy.common.utils.validation.ParameterValidationUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+// @formatter:off
+/**
+ * Apex plugin parameters for REST as an event carrier technology with Apex.
+ *
+ * <p>The parameters for this plugin are:
+ * <ol>
+ * <li>url: The URL that the Apex Rest client will connect to over REST for event reception or event sending. This
+ * parameter is mandatory.
+ * <li>httpMethod: The HTTP method to use when sending events over REST, legal values are POST (default) and PUT. When
+ * receiving events, the REST client plugin always uses the HTTP GET method.
+ * <li>httpHeaders, the HTTP headers to send on REST requests, optional parameter, defaults to none.
+ * <li>httpCodeFilter: a regular expression filter for returned HTTP codes, if the returned HTTP code passes this
+ * filter, then the request is assumed to have succeeded by the plugin, optional, defaults to allowing 2xx codes
+ * through, that is a regular expression of "[2][0-9][0-9]"
+ * </ol>
+ *
+ * @author Ning Xi(ning.xi@ericsson.com)
+ */
+//@formatter:on
+@Setter
+@Getter
+public class RestPluginCarrierTechnologyParameters extends CarrierTechnologyParameters {
+ // Get a reference to the logger
+ private static final Logger LOGGER = LoggerFactory.getLogger(RestPluginCarrierTechnologyParameters.class);
+
+ /** The supported HTTP methods. */
+ public enum HttpMethod {
+ GET, PUT, POST, DELETE
+ }
+
+ /** The label of this carrier technology. */
+ protected String CARRIER_TECHNOLOGY_LABEL;
+
+ /** The producer plugin class for the REST carrier technology. */
+ protected String EVENT_PRODUCER_PLUGIN_CLASS;
+
+ /** The consumer plugin class for the REST carrier technology. */
+ protected String EVENT_CONSUMER_PLUGIN_CLASS;
+
+ /** The default HTTP code filter, allows 2xx HTTP codes through. */
+ public static final String DEFAULT_HTTP_CODE_FILTER = "[2][0-9][0-9]";
+
+ // Commonly occurring strings
+ private static final String HTTP_HEADERS = "httpHeaders";
+ private static final String HTTP_CODE_FILTER = "httpCodeFilter";
+
+ // Regular expression patterns for finding and checking keys in URLs
+ private static final Pattern patternProperKey = Pattern.compile("(?<=\\{)[^}]*(?=\\})");
+ protected static final Pattern patternErrorKey =
+ Pattern.compile("(\\{[^\\{}]*.?\\{)|(\\{[^\\{}]*$)|(\\}[^\\{}]*.?\\})|(^[^\\{}]*.?\\})|\\{\\s*\\}");
+
+ //variable
+ protected String url = null;
+ protected HttpMethod httpMethod = null;
+ protected String[][] httpHeaders = null;
+ protected String httpCodeFilter = DEFAULT_HTTP_CODE_FILTER;
+
+ /**
+ * Constructor to create a REST carrier technology parameters instance and register the instance with the parameter
+ * service.
+ */
+ public RestPluginCarrierTechnologyParameters() {
+ super();
+
+ // Set the carrier technology properties for the web socket carrier technology
+ CARRIER_TECHNOLOGY_LABEL = "RESTPLUGIN";
+ EVENT_PRODUCER_PLUGIN_CLASS = "PRODUCER";
+ EVENT_CONSUMER_PLUGIN_CLASS = "CONSUMER";
+ this.setLabel(CARRIER_TECHNOLOGY_LABEL);
+ this.setEventProducerPluginClass(EVENT_PRODUCER_PLUGIN_CLASS);
+ this.setEventConsumerPluginClass(EVENT_CONSUMER_PLUGIN_CLASS);
+ }
+
+ /**
+ * Check if http headers have been set for the REST request.
+ *
+ * @return true if headers have been set
+ */
+ public boolean checkHttpHeadersSet() {
+ return httpHeaders != null && httpHeaders.length > 0;
+ }
+
+ /**
+ * Gets the http headers for the REST request as a multivalued map.
+ *
+ * @return the headers
+ */
+ public MultivaluedMap<String, Object> getHttpHeadersAsMultivaluedMap() {
+ if (httpHeaders == null) {
+ return null;
+ }
+
+ // Load the HTTP headers into the map
+ MultivaluedMap<String, Object> httpHeaderMap = new MultivaluedHashMap<>();
+
+ for (String[] httpHeader : httpHeaders) {
+ httpHeaderMap.putSingle(httpHeader[0], httpHeader[1]);
+ }
+
+ return httpHeaderMap;
+ }
+
+ /**
+ * Sets the header for the REST request.
+ *
+ * @param httpHeaders the incoming HTTP headers
+ */
+ public void setHttpHeaders(final String[][] httpHeaders) {
+ this.httpHeaders = httpHeaders;
+ }
+
+ /**
+ * Get the tag for the REST Producer Properties.
+ *
+ * @return set of the tags
+ */
+ public Set<String> getKeysFromUrl() {
+ Matcher matcher = patternProperKey.matcher(getUrl());
+ Set<String> key = new HashSet<>();
+ while (matcher.find()) {
+ key.add(matcher.group());
+ }
+ return key;
+ }
+
+ /**
+ * {@inheritDoc}.
+ */
+ @Override
+ public GroupValidationResult validate() {
+ GroupValidationResult result = super.validate();
+
+ result = validateUrl(result);
+
+ result = validateHttpHeaders(result);
+
+ return validateHttpCodeFilter(result);
+ }
+
+ // @formatter:off
+ /**
+ * Validate the URL.
+ *
+ * <p>Checks:
+ * http://www.blah.com/{par1/somethingelse (Missing end tag) use {[^\\{}]*$
+ * http://www.blah.com/{par1/{some}thingelse (Nested tag) use {[^}]*{
+ * http://www.blah.com/{par1}/some}thingelse (Missing start tag1) use }[^{}]*.}
+ * http://www.blah.com/par1}/somethingelse (Missing start tag2) use }[^{}]*}
+ * http://www.blah.com/{}/somethingelse (Empty tag) use {[\s]*}
+ * @param result the result of the validation
+ */
+ // @formatter:on
+ public GroupValidationResult validateUrl(final GroupValidationResult result) {
+ // Check if the URL has been set for event output
+ String URL_ERROR_MSG = "no URL has been set for event sending on " + CARRIER_TECHNOLOGY_LABEL;
+ if (getUrl() == null) {
+ result.setResult("url", ValidationStatus.INVALID, URL_ERROR_MSG);
+ return result;
+ }
+
+ Matcher matcher = patternErrorKey.matcher(getUrl());
+ if (matcher.find()) {
+ result.setResult("url", ValidationStatus.INVALID,
+ URL_ERROR_MSG);
+ }
+
+ return result;
+ }
+
+ /**
+ * Validate the HTTP headers.
+ *
+ * @param result the result of the validation
+ */
+ private GroupValidationResult validateHttpHeaders(final GroupValidationResult result) {
+ if (httpHeaders == null) {
+ return result;
+ }
+
+ for (String[] httpHeader : httpHeaders) {
+ if (httpHeader == null) {
+ result.setResult(HTTP_HEADERS, ValidationStatus.INVALID, "HTTP header array entry is null");
+ } else if (httpHeader.length != 2) {
+ result.setResult(HTTP_HEADERS, ValidationStatus.INVALID,
+ "HTTP header array entries must have one key and one value: "
+ + Arrays.deepToString(httpHeader));
+ } else if (!ParameterValidationUtils.validateStringParameter(httpHeader[0])) {
+ result.setResult(HTTP_HEADERS, ValidationStatus.INVALID,
+ "HTTP header key is null or blank: " + Arrays.deepToString(httpHeader));
+ } else if (!ParameterValidationUtils.validateStringParameter(httpHeader[1])) {
+ result.setResult(HTTP_HEADERS, ValidationStatus.INVALID,
+ "HTTP header value is null or blank: " + Arrays.deepToString(httpHeader));
+ }
+ }
+
+ return result;
+ }
+
+ /**
+ * Validate the HTTP code filter.
+ *
+ * @param result the result of the validation
+ */
+ public GroupValidationResult validateHttpCodeFilter(final GroupValidationResult result) {
+ if (httpCodeFilter == null) {
+ httpCodeFilter = DEFAULT_HTTP_CODE_FILTER;
+
+ } else if (StringUtils.isBlank(httpCodeFilter)) {
+ result.setResult(HTTP_CODE_FILTER, ValidationStatus.INVALID,
+ "HTTP code filter must be specified as a three digit regular expression");
+ } else {
+ try {
+ Pattern.compile(httpCodeFilter);
+ } catch (PatternSyntaxException pse) {
+ String message =
+ "Invalid HTTP code filter, the filter must be specified as a three digit regular expression: "
+ + pse.getMessage();
+ result.setResult(HTTP_CODE_FILTER, ValidationStatus.INVALID, message);
+ LOGGER.debug(message, pse);
+ }
+ }
+
+ return result;
+ }
+
+ /**
+ * {@inheritDoc}.
+ */
+ @Override
+ public String toString() {
+ return CARRIER_TECHNOLOGY_LABEL +"CarrierTechnologyParameters [url=" + url + ", httpMethod=" + httpMethod + ", httpHeaders="
+ + Arrays.deepToString(httpHeaders) + ", httpCodeFilter=" + httpCodeFilter + "]";
+ }
+}