com.hazelcast.org.apache.calcite.avatica.remote.JsonService 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.hazelcast.org.apache.calcite.avatica.remote;
import com.hazelcast.com.fasterxml.jackson.core.JsonParser;
import com.hazelcast.com.fasterxml.jackson.databind.DeserializationFeature;
import com.hazelcast.com.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;
import java.io.StringWriter;
/**
* Implementation of {@link com.hazelcast.org.apache.calcite.avatica.remote.Service}
* that encodes requests and responses as JSON.
*/
public abstract class JsonService extends AbstractService {
public static final ObjectMapper MAPPER;
static {
MAPPER = new ObjectMapper();
MAPPER.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
MAPPER.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
MAPPER.configure(DeserializationFeature.USE_BIG_DECIMAL_FOR_FLOATS, true);
}
public JsonService() {
}
/** Derived class should implement this method to transport requests and
* responses to and from the peer service. */
public abstract String apply(String request);
@Override SerializationType getSerializationType() {
return SerializationType.JSON;
}
//@VisibleForTesting
protected static T decode(String response, Class expectedType)
throws IOException {
Response resp = MAPPER.readValue(response, Response.class);
if (resp instanceof ErrorResponse) {
throw ((ErrorResponse) resp).toException();
} else if (!expectedType.isAssignableFrom(resp.getClass())) {
throw new ClassCastException("Cannot cast " + resp.getClass() + " into " + expectedType);
}
return expectedType.cast(resp);
}
//@VisibleForTesting
protected static String encode(T request) throws IOException {
final StringWriter w = new StringWriter();
MAPPER.writeValue(w, request);
return w.toString();
}
protected RuntimeException handle(IOException e) {
return new RuntimeException(e);
}
public ResultSetResponse apply(CatalogsRequest request) {
try {
return finagle(decode(apply(encode(request)), ResultSetResponse.class));
} catch (IOException e) {
throw handle(e);
}
}
public ResultSetResponse apply(SchemasRequest request) {
try {
return finagle(decode(apply(encode(request)), ResultSetResponse.class));
} catch (IOException e) {
throw handle(e);
}
}
public ResultSetResponse apply(TablesRequest request) {
try {
return finagle(decode(apply(encode(request)), ResultSetResponse.class));
} catch (IOException e) {
throw handle(e);
}
}
public ResultSetResponse apply(TableTypesRequest request) {
try {
return finagle(decode(apply(encode(request)), ResultSetResponse.class));
} catch (IOException e) {
throw handle(e);
}
}
public ResultSetResponse apply(TypeInfoRequest request) {
try {
return finagle(decode(apply(encode(request)), ResultSetResponse.class));
} catch (IOException e) {
throw handle(e);
}
}
public ResultSetResponse apply(ColumnsRequest request) {
try {
return finagle(decode(apply(encode(request)), ResultSetResponse.class));
} catch (IOException e) {
throw handle(e);
}
}
public PrepareResponse apply(PrepareRequest request) {
try {
return finagle(decode(apply(encode(request)), PrepareResponse.class));
} catch (IOException e) {
throw handle(e);
}
}
public ExecuteResponse apply(PrepareAndExecuteRequest request) {
try {
return finagle(decode(apply(encode(request)), ExecuteResponse.class));
} catch (IOException e) {
throw handle(e);
}
}
public FetchResponse apply(FetchRequest request) {
try {
return decode(apply(encode(request)), FetchResponse.class);
} catch (IOException e) {
throw handle(e);
}
}
public ExecuteResponse apply(ExecuteRequest request) {
try {
return finagle(decode(apply(encode(request)), ExecuteResponse.class));
} catch (IOException e) {
throw handle(e);
}
}
public CreateStatementResponse apply(CreateStatementRequest request) {
try {
return decode(apply(encode(request)), CreateStatementResponse.class);
} catch (IOException e) {
throw handle(e);
}
}
public CloseStatementResponse apply(CloseStatementRequest request) {
try {
return decode(apply(encode(request)), CloseStatementResponse.class);
} catch (IOException e) {
throw handle(e);
}
}
public OpenConnectionResponse apply(OpenConnectionRequest request) {
try {
return decode(apply(encode(request)), OpenConnectionResponse.class);
} catch (IOException e) {
throw handle(e);
}
}
public CloseConnectionResponse apply(CloseConnectionRequest request) {
try {
return decode(apply(encode(request)), CloseConnectionResponse.class);
} catch (IOException e) {
throw handle(e);
}
}
public ConnectionSyncResponse apply(ConnectionSyncRequest request) {
try {
return decode(apply(encode(request)), ConnectionSyncResponse.class);
} catch (IOException e) {
throw handle(e);
}
}
public DatabasePropertyResponse apply(DatabasePropertyRequest request) {
try {
return decode(apply(encode(request)), DatabasePropertyResponse.class);
} catch (IOException e) {
throw handle(e);
}
}
public SyncResultsResponse apply(SyncResultsRequest request) {
try {
return decode(apply(encode(request)), SyncResultsResponse.class);
} catch (IOException e) {
throw handle(e);
}
}
public CommitResponse apply(CommitRequest request) {
try {
return decode(apply(encode(request)), CommitResponse.class);
} catch (IOException e) {
throw handle(e);
}
}
public RollbackResponse apply(RollbackRequest request) {
try {
return decode(apply(encode(request)), RollbackResponse.class);
} catch (IOException e) {
throw handle(e);
}
}
public ExecuteBatchResponse apply(PrepareAndExecuteBatchRequest request) {
try {
return decode(apply(encode(request)), ExecuteBatchResponse.class);
} catch (IOException e) {
throw handle(e);
}
}
public ExecuteBatchResponse apply(ExecuteBatchRequest request) {
try {
return decode(apply(encode(request)), ExecuteBatchResponse.class);
} catch (IOException e) {
throw handle(e);
}
}
}
// End JsonService.java
© 2015 - 2024 Weber Informatics LLC | Privacy Policy