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/*
* Copyright 2010-2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package com.ibm.cloud.objectstorage;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import com.ibm.cloud.objectstorage.annotation.NotThreadSafe;
import com.ibm.cloud.objectstorage.annotation.SdkInternalApi;
import com.ibm.cloud.objectstorage.auth.AWSCredentials;
import com.ibm.cloud.objectstorage.auth.AWSCredentialsProvider;
import com.ibm.cloud.objectstorage.event.ProgressListener;
import com.ibm.cloud.objectstorage.handlers.HandlerContextKey;
import com.ibm.cloud.objectstorage.internal.StaticCredentialsProvider;
import com.ibm.cloud.objectstorage.metrics.RequestMetricCollector;
/**
* Base class for all user facing web service requests.
*/
@NotThreadSafe
public abstract class AmazonWebServiceRequest implements Cloneable, ReadLimitInfo, HandlerContextAware {
public static final AmazonWebServiceRequest NOOP = new AmazonWebServiceRequest() {
};
/**
* The optional progress listener for receiving updates about the progress of the request.
*/
private ProgressListener progressListener = ProgressListener.NOOP;
/**
* Arbitrary options storage for individual {@link AmazonWebServiceRequest}s. This field is not
* intended to be used by clients.
*/
private final RequestClientOptions requestClientOptions = new RequestClientOptions();
/**
* A request metric collector used for this specific service request; or null if there is none.
* This collector always takes precedence over the ones specified at the http client level and
* AWS SDK level.
*/
private RequestMetricCollector requestMetricCollector;
/**
* The optional credentials to use for this request - overrides the default credentials set at
* the client level.
*/
private AWSCredentialsProvider credentialsProvider;
/**
* A map of custom header names to header values.
*/
private Map customRequestHeaders;
/**
* Custom query parameters for the request.
*/
private Map> customQueryParameters;
/**
* User-defined context for the request.
*/
private transient Map, Object> handlerContext = new HashMap, Object>();
/**
* The source object from which the current object was cloned; or null if there isn't one.
*/
private AmazonWebServiceRequest cloneSource;
private Integer sdkRequestTimeout = null;
private Integer sdkClientExecutionTimeout = null;
/**
* Sets the optional credentials to use for this request, overriding the default credentials set at the client level.
*
* @param credentials The optional AWS security credentials to use for this request, overriding the default credentials set at
* the client level.
* @deprecated by {@link #setRequestCredentialsProvider(AWSCredentialsProvider)}. If you must use {@link AWSCredentials} you
* can wrap it with a {@link com.ibm.cloud.objectstorage.auth.AWSStaticCredentialsProvider}.
*/
@Deprecated
public void setRequestCredentials(AWSCredentials credentials) {
this.credentialsProvider = credentials == null ? null : new StaticCredentialsProvider(credentials);
}
/**
* Returns the optional credentials to use to sign this request, overriding the default
* credentials set at the client level.
*
* @return The optional credentials to use to sign this request, overriding the default
* credentials set at the client level.
*
* @deprecated by {@link #getRequestCredentialsProvider()}
*/
@Deprecated
public AWSCredentials getRequestCredentials() {
return credentialsProvider == null ? null : credentialsProvider.getCredentials();
}
/**
* Sets the optional credentials provider to use for this request, overriding the default credentials
* provider at the client level.
*
* @param credentialsProvider
* The optional AWS security credentials provider to use for this request, overriding the
* default credentials provider at the client level.
*/
public void setRequestCredentialsProvider(AWSCredentialsProvider credentialsProvider) {
this.credentialsProvider = credentialsProvider;
}
/**
* Returns the optional credentials provider to use to sign this request, overriding the default
* credentials provider at the client level.
*
* @return The optional credentials provider to use to sign this request, overriding the default
* credentials provider at the client level.
*/
public AWSCredentialsProvider getRequestCredentialsProvider() {
return credentialsProvider;
}
/**
* Gets the options stored with this request object. Intended for internal use only.
*/
public RequestClientOptions getRequestClientOptions() {
return requestClientOptions;
}
/**
* Returns a request level metric collector; or null if not specified.
*/
public RequestMetricCollector getRequestMetricCollector() {
return requestMetricCollector;
}
/**
* Sets a request level request metric collector which takes precedence over the ones at the
* http client level and AWS SDK level.
*/
public void setRequestMetricCollector(RequestMetricCollector requestMetricCollector) {
this.requestMetricCollector = requestMetricCollector;
}
/**
* Specifies a request level metric collector which takes precedence over the ones at the http
* client level and AWS SDK level.
*/
public T withRequestMetricCollector(RequestMetricCollector metricCollector) {
setRequestMetricCollector(metricCollector);
@SuppressWarnings("unchecked")
T t = (T) this;
return t;
}
/**
* Sets the optional progress listener for receiving updates about the progress of the request.
*
* @param progressListener
* The new progress listener.
*/
public void setGeneralProgressListener(ProgressListener progressListener) {
this.progressListener = progressListener == null ? ProgressListener.NOOP : progressListener;
}
/**
* Returns the optional progress listener for receiving updates about the progress of the
* request.
*
* @return the optional progress listener for receiving updates about the progress of the
* request.
*/
public ProgressListener getGeneralProgressListener() {
return progressListener;
}
/**
* Sets the optional progress listener for receiving updates about the progress of the request,
* and returns a reference to this object so that method calls can be chained together.
*
* @param progressListener
* The new progress listener.
* @return A reference to this updated object so that method calls can be chained together.
*/
public T withGeneralProgressListener(ProgressListener progressListener) {
setGeneralProgressListener(progressListener);
@SuppressWarnings("unchecked")
T t = (T) this;
return t;
}
/**
* Returns an immutable map of custom header names to header values.
*
* @return The immutable map of custom header names to header values.
*/
public Map getCustomRequestHeaders() {
if (customRequestHeaders == null) {
return null;
}
return Collections.unmodifiableMap(customRequestHeaders);
}
/**
* Put a new custom header to the map of custom header names to custom header values, and return
* the previous value if the header has already been set in this map.
*
* Any custom headers that are defined are used in the HTTP request to the AWS service. These
* headers will be silently ignored in the event that AWS does not recognize them.
*
* NOTE: Custom header values set via this method will overwrite any conflicting values coming
* from the request parameters.
*
* @param name
* The name of the header to add
* @param value
* The value of the header to add
* @return the previous value for the name if it was set, null otherwise
*/
public String putCustomRequestHeader(String name, String value) {
if (customRequestHeaders == null) {
customRequestHeaders = new HashMap();
}
return customRequestHeaders.put(name, value);
}
/**
* @return the immutable map of custom query parameters. The parameter value is modeled as a
* list of strings because multiple values can be specified for the same parameter name.
*/
public Map> getCustomQueryParameters() {
if (customQueryParameters == null) {
return null;
}
return Collections.unmodifiableMap(customQueryParameters);
}
/**
* Add a custom query parameter for the request. Since multiple values are allowed for the same
* query parameter, this method does NOT overwrite any existing parameter values in the request.
*
* Any custom query parameters that are defined are used in the HTTP request to the AWS service.
*
* @param name
* The name of the query parameter
* @param value
* The value of the query parameter. Only the parameter name will be added in the URI
* if the value is set to null. For example, putCustomQueryParameter("param", null)
* will be serialized to "?param", while putCustomQueryParameter("param", "") will be
* serialized to "?param=".
*/
public void putCustomQueryParameter(String name, String value) {
if (customQueryParameters == null) {
customQueryParameters = new HashMap>();
}
List paramList = customQueryParameters.get(name);
if (paramList == null) {
paramList = new LinkedList();
customQueryParameters.put(name, paramList);
}
paramList.add(value);
}
@Override
public final int getReadLimit() {
return requestClientOptions.getReadLimit();
}
/**
* Copies the internal state of this base class to that of the target request.
*
* @return the target request
*/
protected final T copyBaseTo(T target) {
if (customRequestHeaders != null) {
for (Map.Entry e : customRequestHeaders.entrySet())
target.putCustomRequestHeader(e.getKey(), e.getValue());
}
if (customQueryParameters != null) {
for (Map.Entry> e : customQueryParameters.entrySet()) {
if (e.getValue() != null) {
for (String value : e.getValue()) {
target.putCustomQueryParameter(e.getKey(), value);
}
}
}
}
target.setRequestCredentialsProvider(credentialsProvider);
target.setGeneralProgressListener(progressListener);
target.setRequestMetricCollector(requestMetricCollector);
requestClientOptions.copyTo(target.getRequestClientOptions());
return target;
}
/**
* Returns the source object from which the current object was cloned; or null if there isn't
* one.
*/
public AmazonWebServiceRequest getCloneSource() {
return cloneSource;
}
/**
* Returns the root object from which the current object was cloned; or null if there isn't one.
*/
public AmazonWebServiceRequest getCloneRoot() {
AmazonWebServiceRequest cloneRoot = cloneSource;
if (cloneRoot != null) {
while (cloneRoot.getCloneSource() != null) {
cloneRoot = cloneRoot.getCloneSource();
}
}
return cloneRoot;
}
private void setCloneSource(AmazonWebServiceRequest cloneSource) {
this.cloneSource = cloneSource;
}
/**
* Returns the amount of time to wait (in milliseconds) for the request to complete before
* giving up and timing out. A non-positive value disables this feature.
*
* This feature requires buffering the entire response (for non-streaming APIs) into memory to
* enforce a hard timeout when reading the response. For APIs that return large responses this
* could be expensive.
*
*
* The request timeout feature doesn't have strict guarantees on how quickly a request is
* aborted when the timeout is breached. The typical case aborts the request within a few
* milliseconds but there may occasionally be requests that don't get aborted until several
* seconds after the timer has been breached. Because of this the request timeout feature should
* not be used when absolute precision is needed.
*
*
* Note: This feature is not compatible with Java 1.6.
*
*
* @return The amount of time to wait (in milliseconds) for the request to complete before
* giving up and timing out. A non-positive value disables the timeout for this request.
* @see {@link AmazonWebServiceRequest#setSdkClientExecutionTimeout(int)} to enforce a timeout
* across all retries
*/
public Integer getSdkRequestTimeout() {
return sdkRequestTimeout;
}
/**
* Sets the amount of time to wait (in milliseconds) for the request to complete before giving
* up and timing out. A non-positive value disables this feature.
*
* This feature requires buffering the entire response (for non-streaming APIs) into memory to
* enforce a hard timeout when reading the response. For APIs that return large responses this
* could be expensive.
*
*
* The request timeout feature doesn't have strict guarantees on how quickly a request is
* aborted when the timeout is breached. The typical case aborts the request within a few
* milliseconds but there may occasionally be requests that don't get aborted until several
* seconds after the timer has been breached. Because of this the request timeout feature should
* not be used when absolute precision is needed.
*
*
* Note: This feature is not compatible with Java 1.6.
*
*
* @param sdkRequestTimeout
* The amount of time to wait (in milliseconds) for the request to complete before
* giving up and timing out. A non-positive value disables the timeout for this
* request.
* @see {@link AmazonWebServiceRequest#setSdkClientExecutionTimeout(int)} to enforce a timeout
* across all retries
*/
public void setSdkRequestTimeout(int sdkRequestTimeout) {
this.sdkRequestTimeout = sdkRequestTimeout;
}
/**
* Sets the amount of time to wait (in milliseconds) for the request to complete before giving
* up and timing out. A non-positive value disables this feature. Returns the updated
* AmazonWebServiceRequest object so that additional method calls may be chained together.
*
* This feature requires buffering the entire response (for non-streaming APIs) into memory to
* enforce a hard timeout when reading the response. For APIs that return large responses this
* could be expensive.
*
*
* The request timeout feature doesn't have strict guarantees on how quickly a request is
* aborted when the timeout is breached. The typical case aborts the request within a few
* milliseconds but there may occasionally be requests that don't get aborted until several
* seconds after the timer has been breached. Because of this the request timeout feature should
* not be used when absolute precision is needed.
*
*
* Note: This feature is not compatible with Java 1.6.
*
*
* @param sdkRequestTimeout
* The amount of time to wait (in milliseconds) for the request to complete before
* giving up and timing out. A non-positive value disables the timeout for this
* request.
* @return The updated {@link AmazonWebServiceRequest} object.
* @see {@link AmazonWebServiceRequest#setSdkClientExecutionTimeout(int)} to enforce a timeout
* across all retries
*/
public T withSdkRequestTimeout(int sdkRequestTimeout) {
setSdkRequestTimeout(sdkRequestTimeout);
@SuppressWarnings("unchecked")
T t = (T) this;
return t;
}
/**
* Returns the amount of time (in milliseconds) to allow the client to complete the execution of
* an API call. This timeout covers the entire client execution except for marshalling. This
* includes request handler execution, all HTTP request including retries, unmarshalling, etc.
*
* This feature requires buffering the entire response (for non-streaming APIs) into memory to
* enforce a hard timeout when reading the response. For APIs that return large responses this
* could be expensive.
*
*
* The client execution timeout feature doesn't have strict guarantees on how quickly a request
* is aborted when the timeout is breached. The typical case aborts the request within a few
* milliseconds but there may occasionally be requests that don't get aborted until several
* seconds after the timer has been breached. Because of this the client execution timeout
* feature should not be used when absolute precision is needed.
*
*
* This may be used together with {@link AmazonWebServiceRequest#setSdkRequestTimeout(int)} to
* enforce both a timeout on each individual HTTP request (i.e. each retry) and the total time
* spent on all requests across retries (i.e. the 'client execution' time). A non-positive value
* disables this feature.
*
*
* Note: This feature is not compatible with Java 1.6.
*
*
* @return The amount of time (in milliseconds) to allow the client to complete the execution of
* an API call. A non-positive value disables the timeout for this request.
* @see {@link AmazonWebServiceRequest#setSdkRequestTimeout(int)} to enforce a timeout per HTTP
* request
*/
public Integer getSdkClientExecutionTimeout() {
return this.sdkClientExecutionTimeout;
}
/**
* Sets the amount of time (in milliseconds) to allow the client to complete the execution of
* an API call. This timeout covers the entire client execution except for marshalling. This
* includes request handler execution, all HTTP request including retries, unmarshalling, etc.
*
* This feature requires buffering the entire response (for non-streaming APIs) into memory to
* enforce a hard timeout when reading the response. For APIs that return large responses this
* could be expensive.
*
*
* The client execution timeout feature doesn't have strict guarantees on how quickly a request
* is aborted when the timeout is breached. The typical case aborts the request within a few
* milliseconds but there may occasionally be requests that don't get aborted until several
* seconds after the timer has been breached. Because of this the client execution timeout
* feature should not be used when absolute precision is needed.
*
*
* This may be used together with {@link AmazonWebServiceRequest#setSdkRequestTimeout(int)} to
* enforce both a timeout on each individual HTTP request (i.e. each retry) and the total time
* spent on all requests across retries (i.e. the 'client execution' time). A non-positive value
* disables this feature.
*
*
* Note: This feature is not compatible with Java 1.6.
*
*
* @param sdkClientExecutionTimeout
* The amount of time (in milliseconds) to allow the client to complete the execution
* of an API call. A non-positive value disables the timeout for this request.
* @see {@link AmazonWebServiceRequest#setSdkRequestTimeout(int)} to enforce a timeout per HTTP
* request
*/
public void setSdkClientExecutionTimeout(int sdkClientExecutionTimeout) {
this.sdkClientExecutionTimeout = sdkClientExecutionTimeout;
}
/**
* Sets the amount of time (in milliseconds) to allow the client to complete the execution of
* an API call. This timeout covers the entire client execution except for marshalling. This
* includes request handler execution, all HTTP request including retries, unmarshalling, etc.
*
* This feature requires buffering the entire response (for non-streaming APIs) into memory to
* enforce a hard timeout when reading the response. For APIs that return large responses this
* could be expensive.
*
*
* The client execution timeout feature doesn't have strict guarantees on how quickly a request
* is aborted when the timeout is breached. The typical case aborts the request within a few
* milliseconds but there may occasionally be requests that don't get aborted until several
* seconds after the timer has been breached. Because of this the client execution timeout
* feature should not be used when absolute precision is needed.
*
*
* This may be used together with {@link AmazonWebServiceRequest#setSdkRequestTimeout(int)} to
* enforce both a timeout on each individual HTTP request (i.e. each retry) and the total time
* spent on all requests across retries (i.e. the 'client execution' time). A non-positive value
* disables this feature.
*
*
* Note: This feature is not compatible with Java 1.6.
*
*
* @param sdkClientExecutionTimeout
* The amount of time (in milliseconds) to allow the client to complete the execution
* of an API call. A non-positive value disables the timeout for this request.
* @return The updated AmazonWebServiceRequest object for method chaining
* @see {@link AmazonWebServiceRequest#setSdkRequestTimeout(int)} to enforce a timeout per HTTP
* request
*/
public T withSdkClientExecutionTimeout(int sdkClientExecutionTimeout) {
setSdkClientExecutionTimeout(sdkClientExecutionTimeout);
@SuppressWarnings("unchecked")
T t = (T) this;
return t;
}
@Override
public void addHandlerContext(HandlerContextKey key, X value) {
this.handlerContext.put(key, value);
}
@Override
@SuppressWarnings("unchecked")
public X getHandlerContext(HandlerContextKey key) {
return (X) this.handlerContext.get(key);
}
/**
* Retrieve an unmodifiable collection of all handler context objects. This allows a {@link Request} derived from a
* {@link AmazonWebServiceRequest} to inherit its context. This does not protect the objects within the map from being
* modified.
*
* This should not be used by customers.
*/
@SdkInternalApi
Map, Object> getHandlerContext() {
return Collections.unmodifiableMap(this.handlerContext);
}
/**
* Creates a shallow clone of this object for all fields except the handler context. Explicitly does not clone the
* deep structure of the other fields in the message.
*
* @see Object#clone()
*/
@Override
public AmazonWebServiceRequest clone() {
try {
AmazonWebServiceRequest cloned = (AmazonWebServiceRequest) super.clone();
cloned.setCloneSource(this);
// Deep-copy context to ensure modifications made by the handlers do not leak back to the caller or other uses of the
// same request.
cloned.handlerContext = new HashMap, Object>(cloned.handlerContext);
return cloned;
} catch (CloneNotSupportedException e) {
throw new IllegalStateException(
"Got a CloneNotSupportedException from Object.clone() " + "even though we're Cloneable!", e);
}
}
}