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JDBC Driver for Google Cloud Spanner
/*
* Copyright 2016, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package nl.topicus.jdbc.shaded.io.grpc;
import static nl.topicus.jdbc.shaded.com.google.nl.topicus.jdbc.shaded.com.on.base.Preconditions.checkArgument;
import static nl.topicus.jdbc.shaded.com.google.nl.topicus.jdbc.shaded.com.on.base.Preconditions.checkNotNull;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import nl.topicus.jdbc.shaded.javax.annotation.Nullable;
/**
* Descriptor for a service.
*
* @since 1.0.0
*/
public final class ServiceDescriptor {
private final String name;
private final Collection> methods;
private final Object schemaDescriptor;
/**
* Constructs a new Service Descriptor. Users are encouraged to use {@link #newBuilder}
* instead.
*
* @param name The name of the service
* @param methods The methods that are part of the service
* @since 1.0.0
*/
public ServiceDescriptor(String name, MethodDescriptor... methods) {
this(name, Arrays.asList(methods));
}
/**
* Constructs a new Service Descriptor. Users are encouraged to use {@link #newBuilder}
* instead.
*
* @param name The name of the service
* @param methods The methods that are part of the service
* @since 1.0.0
*/
public ServiceDescriptor(String name, Collection> methods) {
this(newBuilder(name).addAllMethods(checkNotNull(methods, "methods")));
}
private ServiceDescriptor(Builder b) {
this.name = b.name;
validateMethodNames(name, b.methods);
this.methods = Collections.unmodifiableList(new ArrayList>(b.methods));
this.schemaDescriptor = b.schemaDescriptor;
}
/**
* Simple name of the service. It is not an absolute path.
*
* @since 1.0.0
*/
public String getName() {
return name;
}
/**
* A collection of {@link MethodDescriptor} instances describing the methods exposed by the
* service.
*
* @since 1.0.0
*/
public Collection> getMethods() {
return methods;
}
/**
* Returns the schema descriptor for this service. A schema descriptor is an object that is not
* used by gRPC core but includes information related to the service. The type of the object
* is specific to the consumer, so both the code setting the schema descriptor and the code
* calling {@link #getSchemaDescriptor()} must coordinate. For example, protobuf generated code
* sets this value, in order to be consumed by the server reflection service. See also:
* {@code nl.topicus.jdbc.shaded.io.grpc.protobuf.ProtoFileDescriptorSupplier}.
*
* @since 1.1.0
*/
@Nullable
@ExperimentalApi("https://github.nl.topicus.jdbc.shaded.com.grpc/grpc-java/issues/2666")
public Object getSchemaDescriptor() {
return schemaDescriptor;
}
static void validateMethodNames(String serviceName, Collection> methods) {
Set allNames = new HashSet(methods.size());
for (MethodDescriptor method : methods) {
checkNotNull(method, "method");
String methodServiceName =
MethodDescriptor.extractFullServiceName(method.getFullMethodName());
checkArgument(serviceName.equals(methodServiceName),
"service names %s != %s", methodServiceName, serviceName);
checkArgument(allNames.add(method.getFullMethodName()),
"duplicate name %s", method.getFullMethodName());
}
}
/**
* Creates a new builder for a {@link ServiceDescriptor}.
*
* @since 1.1.0
*/
public static Builder newBuilder(String name) {
return new Builder(name);
}
/**
* A builder for a {@link ServiceDescriptor}.
*
* @since 1.1.0
*/
public static final class Builder {
private Builder(String name) {
setName(name);
}
private String name;
private List> methods = new ArrayList>();
private Object schemaDescriptor;
/**
* Sets the name. This should be non-{@code null}.
*
* @param name The name of the service.
* @return this builder.
* @since 1.1.0
*/
@ExperimentalApi("https://github.nl.topicus.jdbc.shaded.com.grpc/grpc-java/issues/2666")
public Builder setName(String name) {
this.name = checkNotNull(name, "name");
return this;
}
/**
* Adds a method to this service. This should be non-{@code null}.
*
* @param method the method to add to the descriptor.
* @return this builder.
* @since 1.1.0
*/
public Builder addMethod(MethodDescriptor method) {
methods.add(checkNotNull(method, "method"));
return this;
}
/**
* Currently not exposed. Bulk adds methods to this builder.
*
* @param methods the methods to add.
* @return this builder.
*/
private Builder addAllMethods(Collection> methods) {
this.methods.addAll(methods);
return this;
}
/**
* Sets the schema descriptor for this builder. A schema descriptor is an object that is not
* used by gRPC core but includes information related to the service. The type of the object
* is specific to the consumer, so both the code calling this and the code calling
* {@link ServiceDescriptor#getSchemaDescriptor()} must coordinate. For example, protobuf
* generated code sets this value, in order to be consumed by the server reflection service.
*
* @param schemaDescriptor an object that describes the service structure. Should be immutable.
* @return this builder.
* @since 1.1.0
*/
public Builder setSchemaDescriptor(@Nullable Object schemaDescriptor) {
this.schemaDescriptor = schemaDescriptor;
return this;
}
/**
* Constructs a new {@link ServiceDescriptor}. {@link #setName} should have been called with a
* non-{@code null} value before calling this.
*
* @return a new ServiceDescriptor
* @since 1.1.0
*/
public ServiceDescriptor build() {
return new ServiceDescriptor(this);
}
}
}