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com.aliyun.odps.Tables Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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.aliyun.odps;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.xml.bind.JAXBException;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import com.aliyun.odps.Table.TableModel;
import com.aliyun.odps.commons.transport.Headers;
import com.aliyun.odps.rest.JAXBUtils;
import com.aliyun.odps.rest.ResourceBuilder;
import com.aliyun.odps.rest.RestClient;
import com.aliyun.odps.task.SQLTask;
import com.aliyun.odps.utils.StringUtils;
/**
* Tables表示ODPS中所有{@link Table}的集合
*
* @author [email protected]
*/
public class Tables implements Iterable {
@XmlRootElement(name = "Tables")
private static class ListTablesResponse {
@XmlElement(name = "Table")
private List tables = new ArrayList();
@XmlElement(name = "Marker")
private String marker;
@XmlElement(name = "MaxItems")
private Integer maxItems;
}
@XmlRootElement(name = "Tables")
private static class QueryTables {
@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement(name = "Table")
private static class QueryTable {
@XmlElement(name = "Project")
private String projectName;
@XmlElement(name = "Name")
private String tableName;
QueryTable() {
}
QueryTable(String projectName, String tableName) {
this.projectName = projectName;
this.tableName = tableName;
}
}
@XmlElement(name = "Table")
private List tables = new ArrayList();
}
private RestClient client;
private Odps odps;
Tables(Odps odps) {
this.odps = odps;
this.client = odps.getRestClient();
}
/**
* 获得指定表信息
*
* @param tableName
* 表名
* @return 指定表的信息{@link Table}
*/
public Table get(String tableName) {
return get(getDefaultProjectName(), tableName);
}
/**
* 获得指定表信息
*
* @param projectName
* 所在{@link Project}名称
* @param tableName
* 表名
* @return 指定表的信息{@link Table}
*/
public Table get(String projectName, String tableName) {
TableModel model = new TableModel();
model.name = tableName;
Table t = new Table(model, projectName, odps);
return t;
}
/**
* 判断指定表是否存在
*
* @param tableName
* 表名
* @return 存在返回true, 否则返回false
* @throws OdpsException
*/
public boolean exists(String tableName) throws OdpsException {
return exists(getDefaultProjectName(), tableName);
}
/**
* 判断指定表是否存在
*
* @param projectName
* 所在{@link Project}名称
* @param tableName
* 表名
* @return 存在返回true, 否则返回flase
* @throws OdpsException
*/
public boolean exists(String projectName, String tableName) throws OdpsException {
try {
Table t = get(projectName, tableName);
t.reload();
return true;
} catch (NoSuchObjectException e) {
return false;
}
}
/**
* 获取默认{@link Project}的所有表信息迭代器
*
* @return {@link Table}迭代器
*/
@Override
public Iterator iterator() {
return iterator(getDefaultProjectName(), null);
}
/**
* 获取表信息迭代器
*
* @param projectName
* 指定{@link Project}名称
* @return {@link Table}迭代器
*/
public Iterator iterator(final String projectName) {
return iterator(projectName, null);
}
/**
* 获取默认Project的表信息迭代器
*
* @param filter
* 过滤条件
* @return {@link Table}迭代器
*/
public Iterator iterator(final TableFilter filter) {
return iterator(getDefaultProjectName(), filter);
}
/**
* 获得表信息迭代器
*
* @param projectName
* 所在{@link Project}名称
* @param filter
* 过滤条件
* @return {@link Table}迭代器
*/
public Iterator iterator(final String projectName, final TableFilter filter) {
return new TableListIterator(projectName, filter);
}
/**
* 获取默认{@link Project}的所有表信息迭代器 iterable
*
* @return {@link Table}迭代器
*/
public Iterable iterable() {
return new Iterable() {
@Override
public Iterator iterator() {
return new TableListIterator(getDefaultProjectName(), null);
}
};
}
/**
* 获取表信息迭代器 iterable
*
* @param projectName
* 指定{@link Project}名称
* @return {@link Table}迭代器
*/
public Iterable iterable(final String projectName) {
return new Iterable() {
@Override
public Iterator iterator() {
return new TableListIterator(projectName, null);
}
};
}
/**
* 获取默认Project的表信息迭代器 iterable
*
* @param filter
* 过滤条件
* @return {@link Table}迭代器
*/
public Iterable iterable(final TableFilter filter) {
return new Iterable() {
@Override
public Iterator iterator() {
return new TableListIterator(getDefaultProjectName(), filter);
}
};
}
/**
* 获得表信息迭代器 iterable
*
* @param projectName
* 所在{@link Project}名称
* @param filter
* 过滤条件
* @return {@link Table}迭代器
*/
public Iterable iterable(final String projectName, final TableFilter filter) {
return new Iterable() {
@Override
public Iterator iterator() {
return new TableListIterator(projectName, filter);
}
};
}
private class TableListIterator extends ListIterator {
Map params = new HashMap();
private TableFilter filter;
private String projectName;
TableListIterator(String projectName, TableFilter filter) {
this.filter = filter;
this.projectName = projectName;
}
@Override
protected List list() {
ArrayList tables = new ArrayList();
params.put("expectmarker", "true"); // since sprint-11
String lastMarker = params.get("marker");
if (params.containsKey("marker") && lastMarker.length() == 0) {
return null;
}
if (filter != null) {
if (filter.getName() != null) {
params.put("name", filter.getName());
}
if (filter.getOwner() != null) {
params.put("owner", filter.getOwner());
}
}
String resource = ResourceBuilder.buildTablesResource(projectName);
try {
ListTablesResponse resp = client.request(ListTablesResponse.class, resource, "GET",
params);
for (TableModel model : resp.tables) {
Table t = new Table(model, projectName, odps);
tables.add(t);
}
params.put("marker", resp.marker);
} catch (OdpsException e) {
throw new RuntimeException(e.getMessage(), e);
}
return tables;
}
}
/**
* 创建表
*
* @param tableName
* 表名
* @param schema
* 表结构 {@link TableSchema}
* @throws OdpsException
*/
public void create(String tableName, TableSchema schema) throws OdpsException {
create(client.getDefaultProject(), tableName, schema);
}
/**
* 创建表
*
* @param tableName
* 表名
* @param schema
* 表结构 {@link TableSchema}
* @param ifNotExists
* 在创建表时，如果为 false 而存在同名表，则返回出错；若为 true，则无论是否存在同名表，即使原表结构与要创建的目标表结构不一致，均返回成功。已存在的同名表的元信息不会被改动。
* @throws OdpsException
*/
public void create(String tableName, TableSchema schema, boolean ifNotExists)
throws OdpsException {
create(client.getDefaultProject(), tableName, schema, ifNotExists);
}
/**
* 创建表
*
* @param projectName
* 目标表所在{@link Project}名称
* @param tableName
* 表名
* @param schema
* 表结构 {@link TableSchema}
* @param ifNotExists
* 在创建表时，如果为 false 而存在同名表，则返回出错；若为 true，则无论是否存在同名表，即使原表结构与要创建的目标表结构不一致，均返回成功。已存在的同名表的元信息不会被改动。
* @param shardNum
* 表中shard数量，小于0表示未设置
* @param hubLifecycle
* Hub表生命周期，小于0表示未设置
* @throws OdpsException
*/
public void create(String projectName, String tableName, TableSchema schema, boolean ifNotExists,
Long shardNum, Long hubLifecycle)
throws OdpsException {
create(projectName, tableName, schema, null, ifNotExists, shardNum, hubLifecycle);
}
/**
* 创建表
*
* @param projectName
* 目标表所在{@link Project}名称
* @param tableName
* 所要创建的{@link Table}名称
* @param schema
* 表结构 {@link TableSchema}
*/
public void create(String projectName, String tableName, TableSchema schema)
throws OdpsException {
create(projectName, tableName, schema, false);
}
/**
* 创建表
*
* @param projectName
* 目标表所在{@link Project}名称
* @param tableName
* 所要创建的{@link Table}名称
* @param schema
* 表结构 {@link TableSchema}
* @param ifNotExists
* 在创建表时，如果为 false 而存在同名表，则返回出错；若为 true，则无论是否存在同名表，即使原表结构与要创建的目标表结构不一致，均返回成功。已存在的同名表的元信息不会被改动。
*/
public void create(String projectName, String tableName, TableSchema schema, boolean ifNotExists)
throws OdpsException {
create(projectName, tableName, schema, null, ifNotExists);
}
/**
* 创建表
*
* @param projectName
* 目标表所在{@link Project}名称
* @param tableName
* 所要创建的{@link Table}名称
* @param schema
* 表结构 {@link TableSchema}
* @param comment
* 表注释, 其中不能带有单引号
* @param ifNotExists
* 在创建表时，如果为 false 而存在同名表，则返回出错；若为 true，则无论是否存在同名表，即使原表结构与要创建的目标表结构不一致，均返回成功。已存在的同名表的元信息不会被改动。
* @param shardNum
* 表中shard数量，小于0表示未设置
* @param hubLifecycle
* Hub表生命周期，小于0表示未设置
*/
public void create(String projectName, String tableName, TableSchema schema,
String comment, boolean ifNotExists, Long shardNum, Long hubLifecycle)
throws OdpsException {
// new SQLTask
String taskName = "SQLCreateTableTask";
SQLTask task = new SQLTask();
task.setName(taskName);
task.setQuery(
getHubString(projectName, tableName, schema, comment, ifNotExists, shardNum, hubLifecycle));
Instances instances = new Instances(odps);
Instance instance = instances.create(task);
instance.waitForSuccess();
}
/**
* 创建表
*
* @param projectName
* 目标表所在{@link Project}名称
* @param tableName
* 所要创建的{@link Table}名称
* @param schema
* 表结构 {@link TableSchema}
* @param comment
* 表注释, 其中不能带有单引号
* @param ifNotExists
*/
public void create(String projectName, String tableName, TableSchema schema, String comment,
boolean ifNotExists)
throws OdpsException {
createTableWithLifeCycle(projectName, tableName, schema, comment, ifNotExists, null);
}
/**
* 创建表
*
* @param projectName
* 目标表所在{@link Project}名称
* @param tableName
* 所要创建的{@link Table}名称
* @param schema
* 表结构 {@link TableSchema}
* @param comment
* 表注释, 其中不能带有单引号
* @param ifNotExists
* @param lifeCycle
* 表生命周期
*/
public void createTableWithLifeCycle(String projectName, String tableName, TableSchema schema,
String comment, boolean ifNotExists, Long lifeCycle)
throws OdpsException {
// new SQLTask
String taskName = "SQLCreateTableTask";
SQLTask task = new SQLTask();
task.setName(taskName);
task.setQuery(getSQLString(projectName, tableName, schema, comment, ifNotExists, lifeCycle));
Instances instances = new Instances(odps);
Instance instance = instances.create(task);
instance.waitForSuccess();
}
/**
* 删除表
*
* @param tableName
* 表名
* @throws OdpsException
*/
public void delete(String tableName) throws OdpsException {
delete(client.getDefaultProject(), tableName);
}
/**
* 删除表
*
* @param tableName
* 表名
* @param ifExists
* 如果为 false 表不存在，则返回异常；若为 true，无论表是否存在，皆返回成功。
* @throws OdpsException
*/
public void delete(String tableName, boolean ifExists) throws OdpsException {
delete(client.getDefaultProject(), tableName, ifExists);
}
/**
* 删除表
*
* @param projectName
* 表所在{@link Project}
* @param tableName
* 表名
* @throws OdpsException
*/
public void delete(String projectName, String tableName) throws OdpsException {
delete(projectName, tableName, false);
}
/**
* 删除表
*
* @param projectName
* 表所在{@link Project}
* @param tableName
* 表名
* @param ifExists
* 如果为 false 表不存在，则返回异常；若为 true，无论表是否存在，皆返回成功。
* @throws OdpsException
*/
public void delete(String projectName, String tableName, boolean ifExists) throws OdpsException {
if (projectName == null || tableName == null) {
throw new IllegalArgumentException();
}
StringBuilder sb = new StringBuilder();
sb.append("DROP TABLE ");
if (ifExists) {
sb.append(" IF EXISTS ");
}
sb.append(projectName).append(".").append(tableName).append(";");
// new SQLTask
String taskName = "SQLDropTableTask";
SQLTask task = new SQLTask();
task.setName(taskName);
task.setQuery(sb.toString());
Instances instances = new Instances(odps);
Instance instance = instances.create(task);
instance.waitForSuccess();
}
/**
* 批量加载表信息
*
* @param tableNames
* 表名
* @return 加载后的 {@link Table} 列表
* @throws OdpsException
*/
public List loadTables(final Collection tableNames) throws OdpsException {
return loadTables(getDefaultProjectName(), tableNames);
}
/**
* 批量加载表信息
*
* @param projectName
* 指定{@link Project}名称
* @param tableNames
* 表名
* @return 加载后的 {@link Table} 列表
* @throws OdpsException
*/
public List loadTables(final String projectName, final Collection tableNames)
throws OdpsException {
if (StringUtils.isNullOrEmpty(projectName)) {
throw new IllegalArgumentException("Invalid project name.");
}
if (tableNames == null) {
throw new IllegalArgumentException("Invalid table names.");
}
QueryTables queryTables = new QueryTables();
for (String name : tableNames) {
queryTables.tables.add(new QueryTables.QueryTable(projectName, name));
}
return loadTablesInternal(queryTables);
}
/**
* 批量加载表信息 reloadTables(final Collection tables) throws OdpsException {
if (tables == null) {
throw new IllegalArgumentException("Invalid tables.");
}
return reloadTables(tables.iterator());
}
/**
* 批量加载表信息 reloadTables(final Iterator tables) throws OdpsException {
if (tables == null) {
throw new IllegalArgumentException("Invalid tables.");
}
List loadedTables = new ArrayList();
if (!tables.hasNext()) {
return loadedTables;
}
QueryTables queryTables = new QueryTables();
while (tables.hasNext()) {
Table t = tables.next();
if (t.isLoaded()) {
// table is loaded, do not need to request again
loadedTables.add(t);
} else {
queryTables.tables.add(new QueryTables.QueryTable(t.getProject(), t.getName()));
}
}
if (!queryTables.tables.isEmpty()) {
loadedTables.addAll(loadTablesInternal(queryTables));
}
return loadedTables;
}
private List loadTablesInternal(QueryTables queryTables) throws OdpsException {
ArrayList reloadTables = new ArrayList();
if (queryTables.tables.isEmpty()) {
return reloadTables;
}
Map params = new HashMap();
params.put("query", null);
String resource = ResourceBuilder.buildTablesResource(getDefaultProjectName());
HashMap headers = new HashMap();
headers.put(Headers.CONTENT_TYPE, "application/xml");
String xml = null;
try {
xml = JAXBUtils.marshal(queryTables, QueryTables.class);
} catch (JAXBException e) {
throw new OdpsException(e.getMessage(), e);
}
ListTablesResponse resp =
client.stringRequest(ListTablesResponse.class, resource, "POST", params, headers, xml);
for (TableModel model : resp.tables) {
Table t = new Table(model, model.projectName, odps);
t.reload(model);
reloadTables.add(t);
}
return reloadTables;
}
/* private */
private String getDefaultProjectName() {
String project = client.getDefaultProject();
if (project == null || project.length() == 0) {
throw new RuntimeException("No default project specified.");
}
return project;
}
private String getHubString(String projectName, String tableName, TableSchema schema,
String comment, boolean ifNotExists, Long shardNum,
Long hubLifecycle) {
StringBuilder sb = new StringBuilder();
sb.append(getSQLString(projectName, tableName, schema, comment, ifNotExists, null));
if (sb.length() > 0) {
sb.deleteCharAt(sb.length() - 1);
}
if (null != shardNum) {
sb.append(" INTO " + String.valueOf(shardNum) + " SHARDS");
}
if (null != hubLifecycle) {
sb.append(" HUBLIFECYCLE " + String.valueOf(hubLifecycle));
}
sb.append(';');
return sb.toString();
}
private String getSQLString(
String projectName, String tableName, TableSchema schema,
String comment, boolean ifNotExists, Long lifeCycle) {
if (projectName == null || tableName == null || schema == null) {
throw new IllegalArgumentException();
}
StringBuilder sb = new StringBuilder();
sb.append("CREATE TABLE ");
if (ifNotExists) {
sb.append(" IF NOT EXISTS ");
}
sb.append(projectName).append(".`").append(tableName).append("` (");
List columns = schema.getColumns();
for (int i = 0; i < columns.size(); i++) {
Column c = columns.get(i);
sb.append("`").append(c.getName()).append("` ")
.append(c.getTypeInfo().getTypeName());
if (c.getComment() != null) {
sb.append(" COMMENT '").append(c.getComment()).append("'");
}
if (i + 1 < columns.size()) {
sb.append(',');
}
}
sb.append(')');
if (comment != null) {
sb.append(" COMMENT '" + comment + "' ");
}
List pcolumns = schema.getPartitionColumns();
if (pcolumns.size() > 0) {
sb.append(" PARTITIONED BY (");
for (int i = 0; i < pcolumns.size(); i++) {
Column c = pcolumns.get(i);
sb.append(c.getName()).append(" ")
.append(c.getTypeInfo().getTypeName());
if (c.getComment() != null) {
sb.append(" COMMENT '").append(c.getComment()).append("'");
}
if (i + 1 < pcolumns.size()) {
sb.append(',');
}
}
sb.append(')');
}
if (lifeCycle != null) {
sb.append(" LIFECYCLE ").append(lifeCycle);
}
sb.append(';');
return sb.toString();
}
}
