com.cloudera.csd.tools.MetricDescriptorValidatorTool.java Source code

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Here is the source code for com.cloudera.csd.tools.MetricDescriptorValidatorTool.java

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// Licensed to Cloudera, Inc. under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  Cloudera, Inc. 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 com.cloudera.csd.tools;

import com.cloudera.common.Parser;
import com.cloudera.config.DefaultValidatorConfiguration;
import com.cloudera.csd.descriptors.ServiceMonitoringDefinitionsDescriptor;
import com.cloudera.csd.tools.MetricTools.MetricTool;
import com.cloudera.validation.DescriptorRunner;
import com.cloudera.validation.DescriptorValidator;
import com.cloudera.validation.ValidationRunner;
import com.google.common.base.Preconditions;

import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.Options;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class MetricDescriptorValidatorTool implements MetricTool {

    private static final Logger LOG = LoggerFactory.getLogger(MetricDescriptorValidatorTool.class);

    @SuppressWarnings({ "AccessStaticViaInstance", "static-access" })
    private static final Option OPT_MDL = OptionBuilder.withLongOpt("mdl").withArgName("FILE").hasArg()
            .withDescription("The monitoring definitions to validate.").isRequired(false).create();

    public static void addToolOptions(Options options) {
        options.addOption(OPT_MDL);
    }

    @Override
    public void run(CommandLine cmdLine, OutputStream out, OutputStream err) throws Exception {
        Preconditions.checkNotNull(cmdLine);
        Preconditions.checkNotNull(out);
        Preconditions.checkNotNull(err);

        Writer writer = new OutputStreamWriter(out, "UTF-8");
        try {
            ApplicationContext ctx = new AnnotationConfigApplicationContext(DefaultValidatorConfiguration.class);
            @SuppressWarnings("unchecked")
            Parser<ServiceMonitoringDefinitionsDescriptor> parser = ctx.getBean("mdlParser", Parser.class);
            @SuppressWarnings("unchecked")
            DescriptorValidator<ServiceMonitoringDefinitionsDescriptor> validator = ctx
                    .getBean("serviceMonitoringDefinitionsDescriptorValidator", DescriptorValidator.class);
            ValidationRunner runner = new DescriptorRunner<ServiceMonitoringDefinitionsDescriptor>(parser,
                    validator);
            if (!runner.run(cmdLine.getOptionValue(OPT_MDL.getLongOpt()), writer)) {
                throw new RuntimeException("Validation failed.");
            }
        } catch (Exception ex) {
            LOG.error("Could not run validation tool.", ex);
            IOUtils.write(ex.getMessage() + "\n", err);
            throw ex;
        } finally {
            writer.close();
        }
    }

    @Override
    public String getName() {
        return this.getClass().getSimpleName();
    }
}