com.frank.search.solr.core.schema.SolrPersistentEntitySchemaCreator.java Source code

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Here is the source code for com.frank.search.solr.core.schema.SolrPersistentEntitySchemaCreator.java

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/*
 * Copyright 2014-2015 the original author or authors.
 *
 * 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 com.frank.search.solr.core.schema;

import com.frank.search.solr.core.mapping.SolrPersistentEntity;
import org.springframework.context.ApplicationListener;
import org.springframework.data.mapping.context.MappingContextEvent;
import com.frank.search.solr.server.SolrClientFactory;
import org.springframework.util.CollectionUtils;

import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

/**
 * @author Christoph Strobl
 * @since 1.3
 */
public class SolrPersistentEntitySchemaCreator implements ApplicationListener<MappingContextEvent<?, ?>> {

    public enum Feature {
        CREATE_MISSING_FIELDS;
    }

    private SolrClientFactory factory;
    private SolrSchemaWriter schemaWriter;
    private SolrSchemaResolver schemaResolver;
    private ConcurrentHashMap<Class<?>, Class<?>> processed;

    private Set<Feature> features = new HashSet<Feature>();

    public SolrPersistentEntitySchemaCreator(SolrClientFactory solrClientFactory) {
        this(solrClientFactory, null);
    }

    public SolrPersistentEntitySchemaCreator(SolrClientFactory factory, SolrSchemaWriter schemaWriter) {
        super();
        this.factory = factory;
        this.schemaWriter = schemaWriter != null ? schemaWriter : new SolrSchemaWriter(this.factory);
        this.schemaResolver = new SolrSchemaResolver();
        this.processed = new ConcurrentHashMap<Class<?>, Class<?>>();
    }

    private void process(SolrPersistentEntity<?> entity) {

        SchemaDefinition schema = schemaResolver.resolveSchemaForEntity(entity);

        beforeSchemaWrite(entity, schema);
        schemaWriter.writeSchema(schema);
        afterSchemaWrite(entity, schema);
    }

    protected void beforeSchemaWrite(SolrPersistentEntity<?> entity, SchemaDefinition schema) {
        // before hook
    }

    protected void afterSchemaWrite(SolrPersistentEntity<?> entity, SchemaDefinition schema) {
        processed.put(entity.getType(), entity.getType());
    }

    @Override
    public void onApplicationEvent(MappingContextEvent<?, ?> event) {

        if (features.contains(Feature.CREATE_MISSING_FIELDS)) {

            if (event.getPersistentEntity() instanceof SolrPersistentEntity) {
                SolrPersistentEntity<?> entity = (SolrPersistentEntity<?>) event.getPersistentEntity();
                if (!processed.contains(entity.getType())) {
                    process(entity);
                }
            }
        }
    }

    public SolrPersistentEntitySchemaCreator enable(Feature feature) {

        if (feature != null) {
            this.features.add(feature);
        }
        return this;
    }

    public SolrPersistentEntitySchemaCreator enable(Collection<Feature> features) {

        if (!CollectionUtils.isEmpty(features)) {
            this.features.addAll(features);
        }
        return this;
    }

    public SolrPersistentEntitySchemaCreator disable(Feature feature) {
        features.remove(feature);
        return this;
    }
}