javadoc/io/grpc/stub/MetadataUtils.html - third_party/github.com/grpc/grpc-java - Git at Google

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 <h2 title="Class MetadataUtils" class="title">Class MetadataUtils</h2>
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 <pre>public final class <span class="typeNameLabel">MetadataUtils</span>
 extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></pre>
 <div class="block">Utility functions for binding and receiving headers.</div>
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 <td class="colFirst"><code>static <a href="../ClientInterceptor.html" title="interface in io.grpc">ClientInterceptor</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#newAttachHeadersInterceptor(io.grpc.Metadata)">newAttachHeadersInterceptor</a></span>&#8203;(<a href="../Metadata.html" title="class in io.grpc">Metadata</a>&nbsp;extraHeaders)</code></th>
 <td class="colLast">
 <div class="block">Returns a client interceptor that attaches a set of headers to requests.</div>
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 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>static <a href="../ServerInterceptor.html" title="interface in io.grpc">ServerInterceptor</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#newAttachMetadataServerInterceptor(io.grpc.Metadata)">newAttachMetadataServerInterceptor</a></span>&#8203;(<a href="../Metadata.html" title="class in io.grpc">Metadata</a>&nbsp;extras)</code></th>
 <td class="colLast">
 <div class="block">Returns a ServerInterceptor that adds the specified Metadata to every response stream, one way
  or another.</div>
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 <td class="colFirst"><code>static <a href="../ClientInterceptor.html" title="interface in io.grpc">ClientInterceptor</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#newCaptureMetadataInterceptor(java.util.concurrent.atomic.AtomicReference,java.util.concurrent.atomic.AtomicReference)">newCaptureMetadataInterceptor</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicReference.html?is-external=true" title="class or interface in java.util.concurrent.atomic" class="externalLink">AtomicReference</a>&lt;<a href="../Metadata.html" title="class in io.grpc">Metadata</a>&gt;&nbsp;headersCapture,
                              <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicReference.html?is-external=true" title="class or interface in java.util.concurrent.atomic" class="externalLink">AtomicReference</a>&lt;<a href="../Metadata.html" title="class in io.grpc">Metadata</a>&gt;&nbsp;trailersCapture)</code></th>
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 <div class="block">Captures the last received metadata on a channel.</div>
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 <h4>newAttachHeadersInterceptor</h4>
 <pre class="methodSignature">public static&nbsp;<a href="../ClientInterceptor.html" title="interface in io.grpc">ClientInterceptor</a>&nbsp;newAttachHeadersInterceptor&#8203;(<a href="../Metadata.html" title="class in io.grpc">Metadata</a>&nbsp;extraHeaders)</pre>
 <div class="block">Returns a client interceptor that attaches a set of headers to requests.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>extraHeaders</code> - the headers to be passed by each call that is processed by the returned
                      interceptor</dd>
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 <h4>newCaptureMetadataInterceptor</h4>
 <pre class="methodSignature">public static&nbsp;<a href="../ClientInterceptor.html" title="interface in io.grpc">ClientInterceptor</a>&nbsp;newCaptureMetadataInterceptor&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicReference.html?is-external=true" title="class or interface in java.util.concurrent.atomic" class="externalLink">AtomicReference</a>&lt;<a href="../Metadata.html" title="class in io.grpc">Metadata</a>&gt;&nbsp;headersCapture,
                                                               <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicReference.html?is-external=true" title="class or interface in java.util.concurrent.atomic" class="externalLink">AtomicReference</a>&lt;<a href="../Metadata.html" title="class in io.grpc">Metadata</a>&gt;&nbsp;trailersCapture)</pre>
 <div class="block">Captures the last received metadata on a channel. Useful for testing.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>headersCapture</code> - to record the last received headers</dd>
 <dd><code>trailersCapture</code> - to record the last received trailers</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>an implementation of the channel with captures installed.</dd>
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 <pre class="methodSignature"><a href="../ExperimentalApi.html" title="annotation in io.grpc">@ExperimentalApi</a>("https://github.com/grpc/grpc-java/issues/11462")
 public static&nbsp;<a href="../ServerInterceptor.html" title="interface in io.grpc">ServerInterceptor</a>&nbsp;newAttachMetadataServerInterceptor&#8203;(<a href="../Metadata.html" title="class in io.grpc">Metadata</a>&nbsp;extras)</pre>
 <div class="block">Returns a ServerInterceptor that adds the specified Metadata to every response stream, one way
  or another.

  <p>If, absent this interceptor, a stream would have headers, 'extras' will be added to those
  headers. Otherwise, 'extras' will be sent as trailers. This pattern is useful when you have
  some fixed information, server identity say, that should be included no matter how the call
  turns out. The fallback to trailers avoids artificially committing clients to error responses
  that could otherwise be retried (see https://grpc.io/docs/guides/retry/ for more).

  <p>For correct operation, be sure to arrange for this interceptor to run *before* any others
  that might add headers.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>extras</code> - the Metadata to be added to each stream. Caller gives up ownership.</dd>
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	<h2 title="Class MetadataUtils" class="title">Class MetadataUtils</h2>
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	<pre>public final class <span class="typeNameLabel">MetadataUtils</span>
	extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></pre>
	<div class="block">Utility functions for binding and receiving headers.</div>
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	<td class="colFirst"><code>static <a href="../ClientInterceptor.html" title="interface in io.grpc">ClientInterceptor</a></code></td>
	<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#newAttachHeadersInterceptor(io.grpc.Metadata)">newAttachHeadersInterceptor</a></span>(<a href="../Metadata.html" title="class in io.grpc">Metadata</a> extraHeaders)</code></th>
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	<div class="block">Returns a client interceptor that attaches a set of headers to requests.</div>
	</td>
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	<tr id="i1" class="rowColor">
	<td class="colFirst"><code>static <a href="../ServerInterceptor.html" title="interface in io.grpc">ServerInterceptor</a></code></td>
	<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#newAttachMetadataServerInterceptor(io.grpc.Metadata)">newAttachMetadataServerInterceptor</a></span>(<a href="../Metadata.html" title="class in io.grpc">Metadata</a> extras)</code></th>
	<td class="colLast">
	<div class="block">Returns a ServerInterceptor that adds the specified Metadata to every response stream, one way
	or another.</div>
	</td>
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	<tr id="i2" class="altColor">
	<td class="colFirst"><code>static <a href="../ClientInterceptor.html" title="interface in io.grpc">ClientInterceptor</a></code></td>
	<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#newCaptureMetadataInterceptor(java.util.concurrent.atomic.AtomicReference,java.util.concurrent.atomic.AtomicReference)">newCaptureMetadataInterceptor</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicReference.html?is-external=true" title="class or interface in java.util.concurrent.atomic" class="externalLink">AtomicReference</a><<a href="../Metadata.html" title="class in io.grpc">Metadata</a>> headersCapture,
	<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicReference.html?is-external=true" title="class or interface in java.util.concurrent.atomic" class="externalLink">AtomicReference</a><<a href="../Metadata.html" title="class in io.grpc">Metadata</a>> trailersCapture)</code></th>
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	<div class="block">Captures the last received metadata on a channel.</div>
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	<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang" class="externalLink">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang" class="externalLink">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang" class="externalLink">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang" class="externalLink">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang" class="externalLink">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang" class="externalLink">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang" class="externalLink">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang" class="externalLink">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang" class="externalLink">wait</a></code></li>
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	<h4>newAttachHeadersInterceptor</h4>
	<pre class="methodSignature">public static <a href="../ClientInterceptor.html" title="interface in io.grpc">ClientInterceptor</a> newAttachHeadersInterceptor(<a href="../Metadata.html" title="class in io.grpc">Metadata</a> extraHeaders)</pre>
	<div class="block">Returns a client interceptor that attaches a set of headers to requests.</div>
	<dl>
	<dt><span class="paramLabel">Parameters:</span></dt>
	<dd><code>extraHeaders</code> - the headers to be passed by each call that is processed by the returned
	interceptor</dd>
	</dl>
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	<h4>newCaptureMetadataInterceptor</h4>
	<pre class="methodSignature">public static <a href="../ClientInterceptor.html" title="interface in io.grpc">ClientInterceptor</a> newCaptureMetadataInterceptor(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicReference.html?is-external=true" title="class or interface in java.util.concurrent.atomic" class="externalLink">AtomicReference</a><<a href="../Metadata.html" title="class in io.grpc">Metadata</a>> headersCapture,
	<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicReference.html?is-external=true" title="class or interface in java.util.concurrent.atomic" class="externalLink">AtomicReference</a><<a href="../Metadata.html" title="class in io.grpc">Metadata</a>> trailersCapture)</pre>
	<div class="block">Captures the last received metadata on a channel. Useful for testing.</div>
	<dl>
	<dt><span class="paramLabel">Parameters:</span></dt>
	<dd><code>headersCapture</code> - to record the last received headers</dd>
	<dd><code>trailersCapture</code> - to record the last received trailers</dd>
	<dt><span class="returnLabel">Returns:</span></dt>
	<dd>an implementation of the channel with captures installed.</dd>
	</dl>
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	<h4>newAttachMetadataServerInterceptor</h4>
	<pre class="methodSignature"><a href="../ExperimentalApi.html" title="annotation in io.grpc">@ExperimentalApi</a>("https://github.com/grpc/grpc-java/issues/11462")
	public static <a href="../ServerInterceptor.html" title="interface in io.grpc">ServerInterceptor</a> newAttachMetadataServerInterceptor(<a href="../Metadata.html" title="class in io.grpc">Metadata</a> extras)</pre>
	<div class="block">Returns a ServerInterceptor that adds the specified Metadata to every response stream, one way
	or another.

	<p>If, absent this interceptor, a stream would have headers, 'extras' will be added to those
	headers. Otherwise, 'extras' will be sent as trailers. This pattern is useful when you have
	some fixed information, server identity say, that should be included no matter how the call
	turns out. The fallback to trailers avoids artificially committing clients to error responses
	that could otherwise be retried (see https://grpc.io/docs/guides/retry/ for more).

	<p>For correct operation, be sure to arrange for this interceptor to run before any others
	that might add headers.</div>
	<dl>
	<dt><span class="paramLabel">Parameters:</span></dt>
	<dd><code>extras</code> - the Metadata to be added to each stream. Caller gives up ownership.</dd>
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