graphql-java/src/main/java/graphql/GraphQL.java at master · emeraldjava/graphql-java · GitHub

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package graphql;

import graphql.execution.Execution;

import graphql.execution.ExecutionId;

import graphql.execution.ExecutionIdProvider;

import graphql.execution.ExecutionStrategy;

import graphql.execution.SimpleExecutionStrategy;

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;

@PublicApi

public class GraphQL {

private static final Logger log = LoggerFactory.getLogger(GraphQL.class);

private static final ExecutionIdProvider DEFAULT_EXECUTION_ID_PROVIDER = (query, operationName, context) -> ExecutionId.generate();

private final GraphQLSchema graphQLSchema;

private final ExecutionStrategy queryStrategy;

private final ExecutionStrategy mutationStrategy;

private final ExecutionStrategy subscriptionStrategy;

private final ExecutionIdProvider idProvider;

private final Instrumentation instrumentation;

/**

* A GraphQL object ready to execute queries

* @param graphQLSchema the schema to use

* @deprecated use the {@link #newGraphQL(GraphQLSchema)} builder instead. This will be removed in a future version.

@Internal

public GraphQL(GraphQLSchema graphQLSchema) {

//noinspection deprecation

this(graphQLSchema, null, null);

}

/**

* A GraphQL object ready to execute queries

* @param graphQLSchema the schema to use

* @param queryStrategy the query execution strategy to use

* @deprecated use the {@link #newGraphQL(GraphQLSchema)} builder instead. This will be removed in a future version.

@Internal

public GraphQL(GraphQLSchema graphQLSchema, ExecutionStrategy queryStrategy) {

//noinspection deprecation

this(graphQLSchema, queryStrategy, null);

}

/**

* A GraphQL object ready to execute queries

* @param graphQLSchema the schema to use

* @param queryStrategy the query execution strategy to use

* @param mutationStrategy the mutation execution strategy to use

* @deprecated use the {@link #newGraphQL(GraphQLSchema)} builder instead. This will be removed in a future version.

@Internal

public GraphQL(GraphQLSchema graphQLSchema, ExecutionStrategy queryStrategy, ExecutionStrategy mutationStrategy) {

this(graphQLSchema, queryStrategy, mutationStrategy, null, DEFAULT_EXECUTION_ID_PROVIDER, NoOpInstrumentation.INSTANCE);

}

/**

* A GraphQL object ready to execute queries

* @param graphQLSchema the schema to use

* @param queryStrategy the query execution strategy to use

* @param mutationStrategy the mutation execution strategy to use

* @param subscriptionStrategy the subscription execution strategy to use

* @deprecated use the {@link #newGraphQL(GraphQLSchema)} builder instead. This will be removed in a future version.

@Internal

public GraphQL(GraphQLSchema graphQLSchema, ExecutionStrategy queryStrategy, ExecutionStrategy mutationStrategy, ExecutionStrategy subscriptionStrategy) {

this(graphQLSchema, queryStrategy, mutationStrategy, subscriptionStrategy, DEFAULT_EXECUTION_ID_PROVIDER, NoOpInstrumentation.INSTANCE);

}

private GraphQL(GraphQLSchema graphQLSchema, ExecutionStrategy queryStrategy, ExecutionStrategy mutationStrategy, ExecutionStrategy subscriptionStrategy, ExecutionIdProvider idProvider, Instrumentation instrumentation) {

this.graphQLSchema = assertNotNull(graphQLSchema,"queryStrategy must be non null");

this.queryStrategy = queryStrategy != null ? queryStrategy : new SimpleExecutionStrategy();

this.mutationStrategy = mutationStrategy != null ? mutationStrategy : new SimpleExecutionStrategy();

this.subscriptionStrategy = subscriptionStrategy != null ? subscriptionStrategy : new SimpleExecutionStrategy();

this.idProvider = assertNotNull(idProvider, "idProvider must be non null");

this.instrumentation = instrumentation;

}

/**

* Helps you build a GraphQL object ready to execute queries

* @param graphQLSchema the schema to use

* @return a builder of GraphQL objects

public static Builder newGraphQL(GraphQLSchema graphQLSchema) {

return new Builder(graphQLSchema);

}

@PublicApi

public static class Builder {

private GraphQLSchema graphQLSchema;

private ExecutionStrategy queryExecutionStrategy = new SimpleExecutionStrategy();

private ExecutionStrategy mutationExecutionStrategy = new SimpleExecutionStrategy();

private ExecutionStrategy subscriptionExecutionStrategy = new SimpleExecutionStrategy();

private ExecutionIdProvider idProvider = DEFAULT_EXECUTION_ID_PROVIDER;

private Instrumentation instrumentation = NoOpInstrumentation.INSTANCE;

public Builder(GraphQLSchema graphQLSchema) {

this.graphQLSchema = graphQLSchema;

}

public Builder schema(GraphQLSchema graphQLSchema) {

this.graphQLSchema = assertNotNull(graphQLSchema, "GraphQLSchema must be non null");

return this;

}

public Builder queryExecutionStrategy(ExecutionStrategy executionStrategy) {

this.queryExecutionStrategy = assertNotNull(executionStrategy, "Query ExecutionStrategy must be non null");

return this;

}

public Builder mutationExecutionStrategy(ExecutionStrategy executionStrategy) {

this.mutationExecutionStrategy = assertNotNull(executionStrategy, "Mutation ExecutionStrategy must be non null");

return this;

}

public Builder subscriptionExecutionStrategy(ExecutionStrategy executionStrategy) {

this.subscriptionExecutionStrategy = assertNotNull(executionStrategy, "Subscription ExecutionStrategy must be non null");

return this;

}

public Builder instrumentation(Instrumentation instrumentation) {

this.instrumentation = assertNotNull(instrumentation, "Instrumentation must be non null");

return this;

}

public Builder executionIdProvider(ExecutionIdProvider executionIdProvider) {

this.idProvider = assertNotNull(executionIdProvider, "ExecutionIdProvider must be non null");

return this;

}

public GraphQL build() {

assertNotNull(graphQLSchema,"queryStrategy must be non null");

assertNotNull(queryExecutionStrategy, "queryStrategy must be non null");

assertNotNull(idProvider, "idProvider must be non null");

return new GraphQL(graphQLSchema, queryExecutionStrategy, mutationExecutionStrategy, subscriptionExecutionStrategy, idProvider, instrumentation);

}

public ExecutionResult execute(String requestString) {

return execute(requestString, null);

}

public ExecutionResult execute(String requestString, Object context) {

return execute(requestString, context, Collections.emptyMap());

}

public ExecutionResult execute(String requestString, String operationName, Object context) {

return execute(requestString, operationName, context, Collections.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);

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);

}

ExecutionId executionId = idProvider.provide(requestString, operationName, context);

Execution execution = new Execution(queryStrategy, mutationStrategy, subscriptionStrategy, instrumentation);

ExecutionResult result = execution.execute(executionId, graphQLSchema, context, document, operationName, arguments);

executionCtx.onEnd(result);

return result;

}

graphql-java/src/main/java/graphql/GraphQL.java at master · emeraldjava/graphql-java · GitHub

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