| /* |
| * Copyright 2015, 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 io.grpc; |
| |
| import java.util.List; |
| import java.util.concurrent.Executor; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * A builder for {@link ManagedChannel} instances. |
| * |
| * @param <T> The concrete type of this builder. |
| */ |
| public abstract class ManagedChannelBuilder<T extends ManagedChannelBuilder<T>> { |
| public static ManagedChannelBuilder<?> forAddress(String name, int port) { |
| return ManagedChannelProvider.provider().builderForAddress(name, port); |
| } |
| |
| /** |
| * Creates a channel with a target string, which can be either a valid {@link |
| * NameResolver}-compliant URI, or an authority string. |
| * |
| * <p>A {@code NameResolver}-compliant URI is an absolute hierarchical URI as defined by {@link |
| * java.net.URI}. Example URIs: |
| * <ul> |
| * <li>{@code "dns:///foo.googleapis.com:8080"}</li> |
| * <li>{@code "dns:///foo.googleapis.com"}</li> |
| * <li>{@code "dns:///%5B2001:db8:85a3:8d3:1319:8a2e:370:7348%5D:443"}</li> |
| * <li>{@code "dns://8.8.8.8/foo.googleapis.com:8080"}</li> |
| * <li>{@code "dns://8.8.8.8/foo.googleapis.com"}</li> |
| * <li>{@code "zookeeper://zk.example.com:9900/example_service"}</li> |
| * </ul> |
| * |
| * <p>An authority string will be converted to a {@code NameResolver}-compliant URI, which has |
| * {@code "dns"} as the scheme, no authority, and the original authority string as its path after |
| * properly escaped. Example authority strings: |
| * <ul> |
| * <li>{@code "localhost"}</li> |
| * <li>{@code "127.0.0.1"}</li> |
| * <li>{@code "localhost:8080"}</li> |
| * <li>{@code "foo.googleapis.com:8080"}</li> |
| * <li>{@code "127.0.0.1:8080"}</li> |
| * <li>{@code "[2001:db8:85a3:8d3:1319:8a2e:370:7348]"}</li> |
| * <li>{@code "[2001:db8:85a3:8d3:1319:8a2e:370:7348]:443"}</li> |
| * </ul> |
| */ |
| public static ManagedChannelBuilder<?> forTarget(String target) { |
| return ManagedChannelProvider.provider().builderForTarget(target); |
| } |
| |
| /** |
| * Execute application code directly in the transport thread. |
| * |
| * <p>Depending on the underlying transport, using a direct executor may lead to substantial |
| * performance improvements. However, it also requires the application to not block under |
| * any circumstances. |
| * |
| * <p>Calling this method is semantically equivalent to calling {@link #executor(Executor)} and |
| * passing in a direct executor. However, this is the preferred way as it may allow the transport |
| * to perform special optimizations. |
| */ |
| public abstract T directExecutor(); |
| |
| /** |
| * Provides a custom executor. |
| * |
| * <p>It's an optional parameter. If the user has not provided an executor when the channel is |
| * built, the builder will use a static cached thread pool. |
| * |
| * <p>The channel won't take ownership of the given executor. It's caller's responsibility to |
| * shut down the executor when it's desired. |
| */ |
| public abstract T executor(Executor executor); |
| |
| /** |
| * Adds interceptors that will be called before the channel performs its real work. This is |
| * functionally equivalent to using {@link ClientInterceptors#intercept(Channel, List)}, but while |
| * still having access to the original {@code ManagedChannel}. |
| */ |
| public abstract T intercept(List<ClientInterceptor> interceptors); |
| |
| /** |
| * Adds interceptors that will be called before the channel performs its real work. This is |
| * functionally equivalent to using {@link ClientInterceptors#intercept(Channel, |
| * ClientInterceptor...)}, but while still having access to the original {@code ManagedChannel}. |
| */ |
| public abstract T intercept(ClientInterceptor... interceptors); |
| |
| /** |
| * Provides a custom {@code User-Agent} for the application. |
| * |
| * <p>It's an optional parameter. If provided, the given agent will be prepended by the |
| * grpc {@code User-Agent}. |
| */ |
| public abstract T userAgent(String userAgent); |
| |
| /** |
| * Overrides the authority used with TLS and HTTP virtual hosting. It does not change what host is |
| * actually connected to. Is commonly in the form {@code host:port}. |
| * |
| * <p>Should only used by tests. |
| */ |
| @ExperimentalApi("https://github.com/grpc/grpc-java/issues/1767") |
| public abstract T overrideAuthority(String authority); |
| |
| /* |
| * Use of a plaintext connection to the server. By default a secure connection mechanism |
| * such as TLS will be used. |
| * |
| * <p>Should only be used for testing or for APIs where the use of such API or the data |
| * exchanged is not sensitive. |
| * |
| * @param skipNegotiation @{code true} if there is a priori knowledge that the endpoint supports |
| * plaintext, {@code false} if plaintext use must be negotiated. |
| */ |
| @ExperimentalApi("https://github.com/grpc/grpc-java/issues/1772") |
| public abstract T usePlaintext(boolean skipNegotiation); |
| |
| /* |
| * Provides a custom {@link NameResolver.Factory} for the channel. |
| * |
| * <p>If this method is not called, the builder will try the providers listed by {@link |
| * NameResolverProvider#providers()} for the given target. |
| */ |
| @ExperimentalApi("https://github.com/grpc/grpc-java/issues/1770") |
| public abstract T nameResolverFactory(NameResolver.Factory resolverFactory); |
| |
| /** |
| * Provides a custom {@link LoadBalancer.Factory} for the channel. |
| * |
| * <p>If this method is not called, the builder will use {@link PickFirstBalancerFactory} |
| * for the channel. |
| * |
| * <p>Calling this will make the channel to run the LBv2 code path. See <a |
| * href="https://github.com/grpc/grpc-java/issues/2656" target="_blank">#2656</a> for more |
| * information. |
| * |
| * <p>This method is implemented by all stock channel builders that |
| * are shipped with gRPC, but may not be implemented by custom channel builders, in which case |
| * this method will throw. |
| */ |
| @ExperimentalApi("https://github.com/grpc/grpc-java/issues/1771") |
| public abstract T loadBalancerFactory(LoadBalancer.Factory loadBalancerFactory); |
| |
| /** |
| * Set the decompression registry for use in the channel. This is an advanced API call and |
| * shouldn't be used unless you are using custom message encoding. The default supported |
| * decompressors are in {@code DecompressorRegistry.getDefaultInstance}. |
| */ |
| @ExperimentalApi("https://github.com/grpc/grpc-java/issues/1704") |
| public abstract T decompressorRegistry(DecompressorRegistry registry); |
| |
| /** |
| * Set the compression registry for use in the channel. This is an advanced API call and |
| * shouldn't be used unless you are using custom message encoding. The default supported |
| * compressors are in {@code CompressorRegistry.getDefaultInstance}. |
| */ |
| @ExperimentalApi("https://github.com/grpc/grpc-java/issues/1704") |
| public abstract T compressorRegistry(CompressorRegistry registry); |
| |
| /** |
| * Set the duration without ongoing RPCs before going to idle mode. |
| * |
| * <p>In idle mode the channel shuts down all connections, the NameResolver and the |
| * LoadBalancer. A new RPC would take the channel out of idle mode. A channel starts in idle mode. |
| * |
| * <p>By default the channel will never go to idle mode after it leaves the initial idle |
| * mode. |
| * |
| * <p>This is an advisory option. Do not rely on any specific behavior related to this option. |
| */ |
| @ExperimentalApi("https://github.com/grpc/grpc-java/issues/2022") |
| public abstract T idleTimeout(long value, TimeUnit unit); |
| |
| /** |
| * Sets the maximum message size allowed to be received on the channel. If not called, |
| * defaults to 4 MiB. The default provides protection to clients who haven't considered the |
| * possibility of receiving large messages while trying to be large enough to not be hit in normal |
| * usage. |
| * |
| * <p>This method is advisory, and implementations may decide to not enforce this. Currently, |
| * the only known transport to not enforce this is {@code InProcessTransport}. |
| * |
| * @param max the maximum number of bytes a single message can be. |
| * |
| * @throws IllegalArgumentException if max is negative. |
| */ |
| @ExperimentalApi("https://github.com/grpc/grpc-java/issues/2307") |
| public T maxInboundMessageSize(int max) { |
| // intentional nop |
| return thisT(); |
| } |
| |
| /** |
| * Builds a channel using the given parameters. |
| */ |
| public abstract ManagedChannel build(); |
| |
| /** |
| * Returns the correctly typed version of the builder. |
| */ |
| private T thisT() { |
| @SuppressWarnings("unchecked") |
| T thisT = (T) this; |
| return thisT; |
| } |
| } |