Elasticsearch2.4 Template 批量操作，条件更新，删除

编写不易，转载请注明（  http://shihlei.iteye.com/blog/2339398)

一 前言

    ES 做简单的条件查询，条件删除，在2.4版没有提供，script只提供的update的方案，自己简单封装了下。做面向对象的使用。    

 

二 依赖

        <dependency>
            <groupId>org.elasticsearch</groupId>
            <artifactId>elasticsearch</artifactId>
            <version>2.4.0</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.20</version>
        </dependency>

 

三 程序

连接客户端：

public class EsTcpClient {

    private static final String ES_HOST = "localhost";
    private static final int ES_TCP_PORT = 9300;

    private static TransportClient client;

    /**
     * 获取TCP 客户端
     *
     * @return
     */
    public static synchronized TransportClient getClient() {
        if (client == null) {
            build();
        }
        return client;
    }

    /**
     * 关闭客户端
     */
    public static void close(TransportClient client) {
        if (client != null) {
            client.close();
        }
    }

    /**
     * 建立连接
     *
     * @return
     */
    private static void build() {
        try {
            //特别注意：如果cluster 起了名字，需要在连接时指定名字，否则验证客户端连接的不是默认集群elasticsearch，会忽略，则无法找到节点
            Settings settings = Settings.settingsBuilder()
                    .put("cluster.name", "mycluster").build();
            client = TransportClient.builder().settings(settings).build()
                    .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(ES_HOST), ES_TCP_PORT));
//                .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("host2"), 9300));
        } catch (UnknownHostException e) {
            throw new RuntimeException(e);
        }
    }

}

 

 

 

Template

 

 

public class EsTemplate<T extends EsTemplate.EsBean> {

    //TCP连接客户端：
    private TransportClient client = null;

    public EsTemplate(TransportClient client) {
        this.client = client;
    }

    /**
     * 新增
     *
     * @param doc
     * @return
     */
    public boolean insert(T doc) {
        String json = JSON.toJSONString(doc);
        IndexResponse response = client.prepareIndex(doc.esIndics(), doc.esType(), doc.esId()).setSource(json).get();
        return response.isCreated();
    }

    /**
     * 替换
     *
     * @param doc
     * @return
     */
    public boolean replace(T doc) {
        return update(doc);
    }

    /**
     * 更新
     *
     * @param doc
     * @return
     */
    public boolean update(T doc) {
        String json = JSON.toJSONString(doc);

        UpdateResponse response = client.prepareUpdate(doc.esIndics(), doc.esType(), doc.esId())
                .setDoc(json)
                .get();

        return !response.isCreated();
    }

    /**
     * 删除
     *
     * @param doc
     * @return
     */
    public boolean delete(T doc) {
        DeleteResponse response = client.prepareDelete(doc.esIndics(), doc.esType(), doc.esId()).get();
        return response.isFound();
    }

    /**
     * 查询
     *
     * @param indics   索引名
     * @param type     类型
     * @param id       id
     * @param docClass 检索类型
     * @return
     */
    public T searchById(String indics, String type, String id, Class<T> docClass) {
        GetResponse response = client.prepareGet(indics, type, id).get();
        if (response.isExists()) {
            String json = response.getSourceAsString();
            return JSON.parseObject(json, docClass);
        }
        return null;
    }

    /**
     * 条件查询
     *
     * @param criterias
     * @return
     */
    public List<T> search(String indics, String type, Collection<Criteria> criterias, Class<T> docClass) {
        Function<SearchHit, T> resultConverter = searchHit -> {
            if (searchHit.isSourceEmpty()) {
                return null;
            }
            String json = searchHit.getSourceAsString();
            return JSON.parseObject(json, docClass);
        };

        return executeSearch(indics, type, criterias, true, resultConverter);
    }

    //批量部分------------------------------------------------------------------------------

    /**
     * 批量插入更新
     *
     * @param docs
     * @return
     */
    public int batchInsert(Collection<T> docs) {
        if (docs == null || docs.isEmpty()) {
            return 0;
        }
        //构建批量插入
        Consumer<BulkRequestBuilder> buildRequestFunction = bulkRequestBuilder -> {
            for (T doc : docs) {
                String json = JSON.toJSONString(doc);
                bulkRequestBuilder.add(client.prepareIndex(doc.esIndics(), doc.esType(), doc.esId()).setSource(json));
            }
        };

        executeBulk(buildRequestFunction);
        return docs.size();
    }

    /**
     * 批量更新
     *
     * @param docs
     * @return
     */
    public int batchUpdate(Collection<T> docs) {
        if (docs == null || docs.isEmpty()) {
            return 0;
        }
        //构建批量更新
        Consumer<BulkRequestBuilder> buildRequestFunction = bulkRequestBuilder -> {
            for (T doc : docs) {
                String json = JSON.toJSONString(doc);
                bulkRequestBuilder.add(client.prepareUpdate(doc.esIndics(), doc.esType(), doc.esId())
                        .setDoc(json));
            }
        };

        executeBulk(buildRequestFunction);
        return docs.size();
    }

    /**
     * 批量删除
     *
     * @param docs
     * @return
     */
    public int batchDelete(Collection<T> docs) {
        if (docs == null || docs.isEmpty()) {
            return 0;
        }
        //构建批量更新
        Consumer<BulkRequestBuilder> buildRequestFunction = bulkRequestBuilder -> {
            for (T doc : docs) {
                String json = JSON.toJSONString(doc);
                bulkRequestBuilder.add(client.prepareDelete(doc.esIndics(), doc.esType(), doc.esId()));
            }
        };

        executeBulk(buildRequestFunction);
        return docs.size();
    }


    /**
     * 条件更新
     *
     * @param doc       文档
     * @param criterias 查询条件
     * @return 更新数量
     */
    public int updateByQuery(T doc, Collection<Criteria> criterias) {
        client.admin().indices().prepareRefresh().execute().actionGet();

        final List<String> documentIds = executeSearch(doc.esIndics(), doc.esType(), criterias, false, searchHit -> searchHit.getId());

        if (documentIds.isEmpty()) {
            return 0;
        }

        String json = JSON.toJSONString(doc);
        //构建批量更新
        Consumer<BulkRequestBuilder> buildRequestFunction = bulkRequestBuilder -> {
            for (String id : documentIds) {
                UpdateRequestBuilder updateRequestBuilder = client.prepareUpdate(doc.esIndics(), doc.esType(), id)
                        .setDoc(json);

                bulkRequestBuilder.add(updateRequestBuilder);
            }
        };

        executeBulk(buildRequestFunction);

        return documentIds.size();
    }

    /**
     * 条件删除
     *
     * @param criterias
     * @return
     */
    public int deleteByQuery(String indics, String type, Collection<Criteria> criterias) {
        client.admin().indices().prepareRefresh().execute().actionGet();

        final List<String> documentIds = executeSearch(indics, type, criterias, false, searchHit -> searchHit.getId());
        if (documentIds.isEmpty()) {
            return 0;
        }

        //构建批量删除
        Consumer<BulkRequestBuilder> buildRequestFunction = bulkRequestBuilder -> {
            for (String id : documentIds) {
                bulkRequestBuilder.add(client.prepareDelete(indics, type, id));
            }
        };

        executeBulk(buildRequestFunction);

        return documentIds.size();
    }

    /**
     * 执行批量操作
     *
     * @param buildRequestFunction 构建处理
     */
    private void executeBulk(Consumer<BulkRequestBuilder> buildRequestFunction) {
        BulkRequestBuilder bulkRequestBuilder = client.prepareBulk();

        buildRequestFunction.accept(bulkRequestBuilder);

        BulkResponse bulkResponse = bulkRequestBuilder.execute().actionGet();

        if (bulkResponse.hasFailures()) {
            throw new RuntimeException(bulkResponse.buildFailureMessage());
        }
    }


    //执行查询
    private <E> List<E> executeSearch(String indics, String type, Collection<Criteria> criterias, boolean needSource, Function<SearchHit, E> handleHitfunction) {
        List<E> results = new LinkedList<>();
        //指定查询的库表
        SearchRequestBuilder searchRequestBuilder = client.prepareSearch(indics);
        searchRequestBuilder.setTypes(type);

        searchRequestBuilder.setSize(9999);
        if (!needSource) {
            searchRequestBuilder.addFields();
        }

        if (criterias != null && !criterias.isEmpty()) {
            //构建查询条件必须嵌入filter中！
            BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
            for (Criteria c : criterias) {
                boolQueryBuilder.filter(QueryBuilders.termQuery(c.getFieldName(), c.getFieldValue()));
            }

            searchRequestBuilder.setQuery(boolQueryBuilder);
        }

        //请求
        SearchResponse searchResponse = searchRequestBuilder.get();

        //响应
        SearchHits hits = searchResponse.getHits();

        //无查询结果
        if (hits.totalHits() > 0) {
            SearchHit[] hitList = hits.getHits();
            for (SearchHit searchHit : hitList) {
                E e = handleHitfunction.apply(searchHit);
                if (e != null) {
                    results.add(e);
                }
            }
        }

        return results;
    }

    /**
     * 查询条件
     */
    public static class Criteria {
        private String fieldName;
        private Object fieldValue;

        public Criteria(String fieldName, Object fieldValue) {
            this.fieldName = fieldName;
            this.fieldValue = fieldValue;
        }

        public String getFieldName() {
            return fieldName;
        }

        public void setFieldName(String fieldName) {
            this.fieldName = fieldName;
        }

        public Object getFieldValue() {
            return fieldValue;
        }

        public void setFieldValue(Object fieldValue) {
            this.fieldValue = fieldValue;
        }
    }

    /**
     * ES操作Bean
     */
    public static abstract class EsBean {

        @JSONField(serialize = false, deserialize = false)
        protected Collection<Criteria> criterias = new LinkedList<>();

        public Collection<Criteria> getCriterias() {
            return criterias;
        }

        /**
         * 获取索引库名
         *
         * @return 索引库名
         */
        public abstract String esIndics();

        /**
         * 获取类型
         *
         * @return 索引类型名
         */
        public abstract String esType();

        /**
         * 获取doc id
         *
         * @return 文档id
         */
        public abstract String esId();

        /**
         * 添加操作条件
         *
         * @param criteria 条件
         */
        public void addCriteria(Criteria criteria) {
            criterias.add(criteria);
        }
    }
}

 

 

四 使用

public class EsTset {
    public static void main(String[] args) {
        TransportClient client = EsTcpClient.getClient();
        EsTemplate<TestEsBean> testEsBeanEsTemplate = new EsTemplate<>(client);

        //插入
        Collection<TestEsBean> testEsBeens = new LinkedList<>();
        for(int i=0;i<10;i++){
            testEsBeens.add(new TestEsBean(String.valueOf(i),"name"+i,i));
        }

        testEsBeanEsTemplate.batchInsert(testEsBeens);

        //查询
        Collection<TestEsBean> dbTestEsBeans = testEsBeanEsTemplate.search("testDb","testBean", Arrays.asList(new EsTemplate.Criteria("age",10)),TestEsBean.class);
        for(TestEsBean bean: dbTestEsBeans){
            System.out.println(bean);
        }

        //删除
        testEsBeanEsTemplate.deleteByQuery("testDb","testBean", Arrays.asList(new EsTemplate.Criteria("age",1)));

    }

    public static class TestEsBean extends EsTemplate.EsBean {
        private String id;
        private String name;
        private int age;

        public TestEsBean(String id, String name, int age) {
            this.id = id;
            this.name = name;
            this.age = age;
        }

        @Override
        public String toString() {
            return "TestEsBean{" +
                    "id='" + id + '\'' +
                    ", name='" + name + '\'' +
                    ", age=" + age +
                    '}';
        }

        /**
         * 获取索引库名
         *
         * @return 索引库名
         */
        @Override
        public String esIndics() {
            return "testDb";
        }

        /**
         * 获取类型
         *
         * @return 索引类型名
         */
        @Override
        public String esType() {
            return "testBean";
        }

        /**
         * 获取doc id
         *
         * @return 文档id
         */
        @Override
        public String esId() {
            return id;
        }
    }
}