Examples with SubSchemaWrapper org.apache.drill.exec.store.SubSchemaWrapper used on opensource projects

Example 1 with SubSchemaWrapper

use of org.apache.drill.exec.store.SubSchemaWrapper in project drill by apache.

the class DynamicRootSchema method loadSchemaFactory.

/**
 * Loads schema factory(storage plugin) for specified {@code schemaName}
 * @param schemaName the name of the schema
 * @param caseSensitive whether matching for the schema name is case sensitive
 */
private void loadSchemaFactory(String schemaName, boolean caseSensitive) {
    try {
        SchemaPlus schemaPlus = this.plus();
        StoragePlugin plugin = storages.getPlugin(schemaName);
        if (plugin != null) {
            plugin.registerSchemas(schemaConfig, schemaPlus);
            return;
        }
        // Could not find the plugin of schemaName. The schemaName could be `dfs.tmp`, a 2nd level schema under 'dfs'
        List<String> paths = SchemaUtilites.getSchemaPathAsList(schemaName);
        if (paths.size() == 2) {
            plugin = storages.getPlugin(paths.get(0));
            if (plugin == null) {
                return;
            }
            // Looking for the SchemaPlus for the top level (e.g. 'dfs') of schemaName (e.g. 'dfs.tmp')
            SchemaPlus firstLevelSchema = schemaPlus.getSubSchema(paths.get(0));
            if (firstLevelSchema == null) {
                // register schema for this storage plugin to 'this'.
                plugin.registerSchemas(schemaConfig, schemaPlus);
                firstLevelSchema = schemaPlus.getSubSchema(paths.get(0));
            }
            // Load second level schemas for this storage plugin
            List<SchemaPlus> secondLevelSchemas = new ArrayList<>();
            for (String secondLevelSchemaName : firstLevelSchema.getSubSchemaNames()) {
                secondLevelSchemas.add(firstLevelSchema.getSubSchema(secondLevelSchemaName));
            }
            for (SchemaPlus schema : secondLevelSchemas) {
                org.apache.drill.exec.store.AbstractSchema drillSchema;
                try {
                    drillSchema = schema.unwrap(AbstractSchema.class);
                } catch (ClassCastException e) {
                    throw new RuntimeException(String.format("Schema '%s' is not expected under root schema", schema.getName()));
                }
                SubSchemaWrapper wrapper = new SubSchemaWrapper(drillSchema);
                schemaPlus.add(wrapper.getName(), wrapper);
            }
        }
    } catch (PluginException | IOException ex) {
        logger.warn("Failed to load schema for \"" + schemaName + "\"!", ex);
        // We can't proceed further without a schema, throw a runtime exception.
        UserException.Builder exceptBuilder = UserException.resourceError(ex).message("Failed to load schema for \"" + schemaName + "\"!").addContext(ex.getClass().getName() + ": " + ex.getMessage()).addContext(// Provide hint if it exists
        UserExceptionUtils.getUserHint(ex));
        throw exceptBuilder.build(logger);
    }
}

Example 2 with SubSchemaWrapper

use of org.apache.drill.exec.store.SubSchemaWrapper in project drill by axbaretto.

the class DynamicRootSchema method loadSchemaFactory.

/**
 * load schema factory(storage plugin) for schemaName
 * @param schemaName
 * @param caseSensitive
 */
public void loadSchemaFactory(String schemaName, boolean caseSensitive) {
    try {
        SchemaPlus thisPlus = this.plus();
        StoragePlugin plugin = getSchemaFactories().getPlugin(schemaName);
        if (plugin != null) {
            plugin.registerSchemas(schemaConfig, thisPlus);
            return;
        }
        // Could not find the plugin of schemaName. The schemaName could be `dfs.tmp`, a 2nd level schema under 'dfs'
        String[] paths = schemaName.split("\\.");
        if (paths.length == 2) {
            plugin = getSchemaFactories().getPlugin(paths[0]);
            if (plugin == null) {
                return;
            }
            // Found the storage plugin for first part(e.g. 'dfs') of schemaName (e.g. 'dfs.tmp')
            // register schema for this storage plugin to 'this'.
            plugin.registerSchemas(schemaConfig, thisPlus);
            // Load second level schemas for this storage plugin
            final SchemaPlus firstlevelSchema = thisPlus.getSubSchema(paths[0]);
            final List<SchemaPlus> secondLevelSchemas = Lists.newArrayList();
            for (String secondLevelSchemaName : firstlevelSchema.getSubSchemaNames()) {
                secondLevelSchemas.add(firstlevelSchema.getSubSchema(secondLevelSchemaName));
            }
            for (SchemaPlus schema : secondLevelSchemas) {
                org.apache.drill.exec.store.AbstractSchema drillSchema;
                try {
                    drillSchema = schema.unwrap(org.apache.drill.exec.store.AbstractSchema.class);
                } catch (ClassCastException e) {
                    throw new RuntimeException(String.format("Schema '%s' is not expected under root schema", schema.getName()));
                }
                SubSchemaWrapper wrapper = new SubSchemaWrapper(drillSchema);
                thisPlus.add(wrapper.getName(), wrapper);
            }
        }
    } catch (ExecutionSetupException | IOException ex) {
        logger.warn("Failed to load schema for \"" + schemaName + "\"!", ex);
    }
}

Example 3 with SubSchemaWrapper

use of org.apache.drill.exec.store.SubSchemaWrapper in project drill by axbaretto.

the class DynamicRootSchema method loadSchemaFactory.

/**
 * load schema factory(storage plugin) for schemaName
 * @param schemaName
 * @param caseSensitive
 */
public void loadSchemaFactory(String schemaName, boolean caseSensitive) {
    try {
        SchemaPlus thisPlus = this.plus();
        StoragePlugin plugin = getSchemaFactories().getPlugin(schemaName);
        if (plugin != null) {
            plugin.registerSchemas(schemaConfig, thisPlus);
            return;
        }
        // Could not find the plugin of schemaName. The schemaName could be `dfs.tmp`, a 2nd level schema under 'dfs'
        String[] paths = schemaName.split("\\.");
        if (paths.length == 2) {
            plugin = getSchemaFactories().getPlugin(paths[0]);
            if (plugin == null) {
                return;
            }
            // Found the storage plugin for first part(e.g. 'dfs') of schemaName (e.g. 'dfs.tmp')
            // register schema for this storage plugin to 'this'.
            plugin.registerSchemas(schemaConfig, thisPlus);
            // Load second level schemas for this storage plugin
            final SchemaPlus firstlevelSchema = thisPlus.getSubSchema(paths[0]);
            final List<SchemaPlus> secondLevelSchemas = Lists.newArrayList();
            for (String secondLevelSchemaName : firstlevelSchema.getSubSchemaNames()) {
                secondLevelSchemas.add(firstlevelSchema.getSubSchema(secondLevelSchemaName));
            }
            for (SchemaPlus schema : secondLevelSchemas) {
                org.apache.drill.exec.store.AbstractSchema drillSchema;
                try {
                    drillSchema = schema.unwrap(org.apache.drill.exec.store.AbstractSchema.class);
                } catch (ClassCastException e) {
                    throw new RuntimeException(String.format("Schema '%s' is not expected under root schema", schema.getName()));
                }
                SubSchemaWrapper wrapper = new SubSchemaWrapper(drillSchema);
                thisPlus.add(wrapper.getName(), wrapper);
            }
        }
    } catch (ExecutionSetupException | IOException ex) {
        logger.warn("Failed to load schema for \"" + schemaName + "\"!", ex);
    }
}