1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18 package org.apache.shardingsphere.sharding.distsql.handler.update;
19
20 import com.cedarsoftware.util.CaseInsensitiveSet;
21 import lombok.Setter;
22 import org.apache.shardingsphere.distsql.handler.engine.update.rdl.rule.spi.database.DatabaseRuleCreateExecutor;
23 import org.apache.shardingsphere.infra.exception.kernel.metadata.rule.DuplicateRuleException;
24 import org.apache.shardingsphere.infra.exception.kernel.metadata.rule.InvalidRuleConfigurationException;
25 import org.apache.shardingsphere.infra.exception.kernel.metadata.rule.MissingRequiredRuleException;
26 import org.apache.shardingsphere.distsql.handler.required.DistSQLExecutorCurrentRuleRequired;
27 import org.apache.shardingsphere.infra.exception.core.ShardingSpherePreconditions;
28 import org.apache.shardingsphere.infra.metadata.database.ShardingSphereDatabase;
29 import org.apache.shardingsphere.sharding.api.config.ShardingRuleConfiguration;
30 import org.apache.shardingsphere.sharding.api.config.rule.ShardingAutoTableRuleConfiguration;
31 import org.apache.shardingsphere.sharding.api.config.rule.ShardingTableReferenceRuleConfiguration;
32 import org.apache.shardingsphere.sharding.api.config.rule.ShardingTableRuleConfiguration;
33 import org.apache.shardingsphere.sharding.distsql.handler.checker.ShardingTableRuleStatementChecker;
34 import org.apache.shardingsphere.sharding.distsql.segment.table.TableReferenceRuleSegment;
35 import org.apache.shardingsphere.sharding.distsql.statement.CreateShardingTableReferenceRuleStatement;
36 import org.apache.shardingsphere.sharding.rule.ShardingRule;
37
38 import java.util.Arrays;
39 import java.util.Collection;
40 import java.util.Collections;
41 import java.util.stream.Collectors;
42
43
44
45
46 @DistSQLExecutorCurrentRuleRequired(ShardingRule.class)
47 @Setter
48 public final class CreateShardingTableReferenceRuleExecutor implements DatabaseRuleCreateExecutor<CreateShardingTableReferenceRuleStatement, ShardingRule, ShardingRuleConfiguration> {
49
50 private ShardingSphereDatabase database;
51
52 private ShardingRule rule;
53
54 @Override
55 public void checkBeforeUpdate(final CreateShardingTableReferenceRuleStatement sqlStatement) {
56 if (!sqlStatement.isIfNotExists()) {
57 checkDuplicatedRuleNames(sqlStatement);
58 }
59 checkDuplicatedTablesInShardingTableReferenceRules(sqlStatement);
60 checkToBeReferencedShardingTablesExisted(sqlStatement);
61 checkShardingTableReferenceRulesValid(sqlStatement);
62 }
63
64 private void checkDuplicatedRuleNames(final CreateShardingTableReferenceRuleStatement sqlStatement) {
65 Collection<String> duplicatedRuleNames = getDuplicatedRuleNames(sqlStatement);
66 ShardingSpherePreconditions.checkMustEmpty(duplicatedRuleNames, () -> new DuplicateRuleException("sharding table reference", database.getName(), duplicatedRuleNames));
67 }
68
69 private void checkDuplicatedTablesInShardingTableReferenceRules(final CreateShardingTableReferenceRuleStatement sqlStatement) {
70 Collection<String> currentReferencedTableNames = getReferencedTableNames();
71 Collection<String> duplicatedTableNames = sqlStatement.getTableNames().stream().filter(currentReferencedTableNames::contains).collect(Collectors.toSet());
72 ShardingSpherePreconditions.checkMustEmpty(duplicatedTableNames, () -> new DuplicateRuleException("sharding table reference", database.getName(), duplicatedTableNames));
73 }
74
75 private void checkToBeReferencedShardingTablesExisted(final CreateShardingTableReferenceRuleStatement sqlStatement) {
76 Collection<String> currentShardingTableNames = getCurrentShardingTableNames();
77 Collection<String> notExistedTableNames = sqlStatement.getTableNames().stream().filter(each -> !currentShardingTableNames.contains(each)).collect(Collectors.toSet());
78 ShardingSpherePreconditions.checkMustEmpty(notExistedTableNames, () -> new MissingRequiredRuleException("Sharding", database.getName(), notExistedTableNames));
79 }
80
81 private Collection<String> getCurrentShardingTableNames() {
82 Collection<String> result = new CaseInsensitiveSet<>();
83 result.addAll(rule.getConfiguration().getTables().stream().map(ShardingTableRuleConfiguration::getLogicTable).collect(Collectors.toSet()));
84 result.addAll(rule.getConfiguration().getAutoTables().stream().map(ShardingAutoTableRuleConfiguration::getLogicTable).collect(Collectors.toSet()));
85 return result;
86 }
87
88 private void checkShardingTableReferenceRulesValid(final CreateShardingTableReferenceRuleStatement sqlStatement) {
89 Collection<ShardingTableReferenceRuleConfiguration> bindingTableGroups = buildToBeCreatedRuleConfiguration(sqlStatement).getBindingTableGroups();
90 Collection<String> names = bindingTableGroups.stream().map(ShardingTableReferenceRuleConfiguration::getName).collect(Collectors.toList());
91 ShardingSpherePreconditions.checkState(ShardingTableRuleStatementChecker.isValidBindingTableGroups(bindingTableGroups, rule.getConfiguration()),
92 () -> new InvalidRuleConfigurationException("sharding table", names, Collections.singleton("invalid sharding table reference.")));
93 }
94
95 private Collection<String> getReferencedTableNames() {
96 return rule.getConfiguration().getBindingTableGroups().stream().flatMap(each -> Arrays.stream(each.getReference().split(","))).map(String::trim).collect(Collectors.toList());
97 }
98
99 @Override
100 public ShardingRuleConfiguration buildToBeCreatedRuleConfiguration(final CreateShardingTableReferenceRuleStatement sqlStatement) {
101 Collection<TableReferenceRuleSegment> segments = sqlStatement.getRules();
102 if (sqlStatement.isIfNotExists()) {
103 Collection<String> duplicatedRuleNames = getDuplicatedRuleNames(sqlStatement);
104 segments.removeIf(each -> duplicatedRuleNames.contains(each.getName()));
105 }
106 ShardingRuleConfiguration result = new ShardingRuleConfiguration();
107 segments.forEach(each -> result.getBindingTableGroups().add(new ShardingTableReferenceRuleConfiguration(each.getName(), each.getReference())));
108 return result;
109 }
110
111 private Collection<String> getDuplicatedRuleNames(final CreateShardingTableReferenceRuleStatement sqlStatement) {
112 Collection<String> currentRuleNames = rule.getConfiguration().getBindingTableGroups().stream().map(ShardingTableReferenceRuleConfiguration::getName).collect(Collectors.toSet());
113 return sqlStatement.getRules().stream().map(TableReferenceRuleSegment::getName).filter(currentRuleNames::contains).collect(Collectors.toSet());
114 }
115
116 @Override
117 public Class<ShardingRule> getRuleClass() {
118 return ShardingRule.class;
119 }
120
121 @Override
122 public Class<CreateShardingTableReferenceRuleStatement> getType() {
123 return CreateShardingTableReferenceRuleStatement.class;
124 }
125 }