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110 lines (80 loc) · 4.41 KB
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package graphql;
import graphql.execution.Execution;
import graphql.execution.ExecutionStrategy;
import graphql.execution.instrumentation.Instrumentation;
import graphql.execution.instrumentation.InstrumentationContext;
import graphql.execution.instrumentation.NoOpInstrumentation;
import graphql.execution.instrumentation.parameters.ExecutionParameters;
import graphql.execution.instrumentation.parameters.ValidationParameters;
import graphql.language.Document;
import graphql.language.SourceLocation;
import graphql.parser.Parser;
import graphql.schema.GraphQLSchema;
import graphql.validation.ValidationError;
import graphql.validation.Validator;
import org.antlr.v4.runtime.RecognitionException;
import org.antlr.v4.runtime.misc.ParseCancellationException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import static graphql.Assert.assertNotNull;
public class GraphQL {
private final GraphQLSchema graphQLSchema;
private final ExecutionStrategy executionStrategy;
private final Instrumentation instrumentation;
private static final Logger log = LoggerFactory.getLogger(GraphQL.class);
public GraphQL(GraphQLSchema graphQLSchema) {
this(graphQLSchema, null);
}
public GraphQL(GraphQLSchema graphQLSchema, ExecutionStrategy executionStrategy) {
this(graphQLSchema, executionStrategy, NoOpInstrumentation.INSTANCE);
}
public GraphQL(GraphQLSchema graphQLSchema, ExecutionStrategy executionStrategy, Instrumentation instrumentation) {
this.graphQLSchema = graphQLSchema;
this.executionStrategy = executionStrategy;
this.instrumentation = instrumentation;
}
public ExecutionResult execute(String requestString) {
return execute(requestString, null);
}
public ExecutionResult execute(String requestString, Object context) {
return execute(requestString, context, Collections.<String, Object>emptyMap());
}
public ExecutionResult execute(String requestString, String operationName, Object context) {
return execute(requestString, operationName, context, Collections.<String, Object>emptyMap());
}
public ExecutionResult execute(String requestString, Object context, Map<String, Object> arguments) {
return execute(requestString, null, context, arguments);
}
public ExecutionResult execute(String requestString, String operationName, Object context, Map<String, Object> arguments) {
InstrumentationContext<ExecutionResult> executionCtx = instrumentation.beginExecution(new ExecutionParameters(requestString, operationName, context, arguments));
assertNotNull(arguments, "arguments can't be null");
log.debug("Executing request. operation name: {}. Request: {} ", operationName, requestString);
InstrumentationContext<Document> parseCtx = instrumentation.beginParse(new ExecutionParameters(requestString, operationName, context, arguments));
Parser parser = new Parser();
Document document;
try {
document = parser.parseDocument(requestString);
parseCtx.onEnd(document);
} catch (ParseCancellationException e) {
RecognitionException recognitionException = (RecognitionException) e.getCause();
SourceLocation sourceLocation = new SourceLocation(recognitionException.getOffendingToken().getLine(), recognitionException.getOffendingToken().getCharPositionInLine());
InvalidSyntaxError invalidSyntaxError = new InvalidSyntaxError(sourceLocation);
parseCtx.onEnd(e);
return new ExecutionResultImpl(Collections.singletonList(invalidSyntaxError));
}
InstrumentationContext<List<ValidationError>> validationCtx = instrumentation.beginValidation(new ValidationParameters(requestString,operationName,context,arguments,document));
Validator validator = new Validator();
List<ValidationError> validationErrors = validator.validateDocument(graphQLSchema, document);
validationCtx.onEnd(validationErrors);
if (validationErrors.size() > 0) {
return new ExecutionResultImpl(validationErrors);
}
Execution execution = new Execution(executionStrategy, instrumentation);
ExecutionResult result = execution.execute(graphQLSchema, context, document, operationName, arguments);
executionCtx.onEnd(result);
return result;
}
}