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/**
* Copyright 2017 ZTE Corporation.
* <p>
* 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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.onap.holmes.engine.resources;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import lombok.extern.slf4j.Slf4j;
import org.onap.holmes.common.dmaap.store.ClosedLoopControlNameCache;
import org.onap.holmes.common.exception.CorrelationException;
import org.onap.holmes.common.utils.ExceptionUtil;
import org.onap.holmes.engine.manager.DroolsEngine;
import org.onap.holmes.engine.request.CompileRuleRequest;
import org.onap.holmes.engine.request.DeployRuleRequest;
import org.onap.holmes.engine.response.CorrelationRuleResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import jakarta.ws.rs.core.MediaType;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
@Slf4j
@RestController
@RequestMapping("/rule")
@Api(tags = {"Holmes Engine Management"})
public class EngineResources {
private Pattern packagePattern = Pattern.compile("package[\\s]+([^;]+)[;\\s]*");
private ClosedLoopControlNameCache closedLoopControlNameCache;
private DroolsEngine droolsEngine;
@Autowired
public void setDroolsEngine(DroolsEngine droolsEngine) {
this.droolsEngine = droolsEngine;
}
@Autowired
public void setClosedLoopControlNameCache(ClosedLoopControlNameCache closedLoopControlNameCache) {
this.closedLoopControlNameCache = closedLoopControlNameCache;
}
@ResponseBody
@PutMapping(produces = MediaType.APPLICATION_JSON)
public CorrelationRuleResponse deployRule(
@ApiParam(value = "The request entity of the HTTP call, which comprises three "
+ "fields: \"content\" , \"loopControlName\" and \"engineId\". "
+ "The \"content\" should be a valid Drools rule string and the \"engineId\" "
+ "has to be \"engine-d\" in the Amsterdam release.", required = true)
@RequestBody DeployRuleRequest deployRuleRequest) {
CorrelationRuleResponse crResponse = new CorrelationRuleResponse();
try {
String packageName = getPackageName(deployRuleRequest.getContent());
if (packageName == null) {
throw new CorrelationException("Could not find package name in rule: " + deployRuleRequest.getContent());
}
closedLoopControlNameCache
.put(packageName, deployRuleRequest.getLoopControlName());
String packageNameRet = droolsEngine.deployRule(deployRuleRequest);
if (!packageName.equals(packageNameRet)) {
log.info("The parsed package name is different from that returned by the engine.");
closedLoopControlNameCache.remove(packageName);
closedLoopControlNameCache
.put(packageNameRet, deployRuleRequest.getLoopControlName());
}
log.info("Rule deployed. Package name: " + packageNameRet);
crResponse.setPackageName(packageNameRet);
} catch (CorrelationException correlationException) {
log.error(correlationException.getMessage(), correlationException);
throw ExceptionUtil.buildExceptionResponse(correlationException.getMessage());
} catch (RuntimeException e) {
log.error(e.getMessage(), e);
throw ExceptionUtil.buildExceptionResponse(e.getMessage());
}
return crResponse;
}
@DeleteMapping(value = "/{packageName}")
public void undeployRule(@PathVariable("packageName") String packageName) {
try {
droolsEngine.undeployRule(packageName);
closedLoopControlNameCache.remove(packageName);
} catch (CorrelationException correlationException) {
log.error(correlationException.getMessage(), correlationException);
throw ExceptionUtil.buildExceptionResponse(correlationException.getMessage());
}
}
@PostMapping
@ApiOperation(value = "Check the validity of a rule.")
public void compileRule(@RequestBody CompileRuleRequest compileRuleRequest) {
try {
droolsEngine.compileRule(compileRuleRequest.getContent());
} catch (CorrelationException correlationException) {
log.error(correlationException.getMessage(), correlationException);
throw ExceptionUtil.buildExceptionResponse(correlationException.getMessage());
}
}
private String getPackageName(String contents) {
Matcher m = packagePattern.matcher(contents);
if (m.find()) {
return m.group(1);
} else {
return null;
}
}
}
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