我正在使用int-sftp:inbound-channel-adapter
观看多个远程文件夹,但我遇到了本地过滤器问题。
<int-sftp:inbound-channel-adapter id="inboundChannelPmse"
session-factory="sftpSessionFactory"
channel="chan"
remote-directory="${rdir1}"
filter="remoteUnseenFilter"
preserve-timestamp="true"
local-directory="${ldir1}"
auto-create-local-directory="true"
temporary-file-suffix=".writing"
local-filter="localOnlyXmlFilter"
delete-remote-files="false"
local-filename-generator-expression="#this.toLowerCase()"
>
<int:poller fixed-rate="10000" max-messages-per-poll="-1" />
</int-sftp:inbound-channel-adapter>
<int-sftp:inbound-channel-adapter id="inboundChannelOfcomDefault"
session-factory="sftpSessionFactory"
channel="chan"
remote-directory="${rdir2}"
filter="remoteUnseenFilter"
preserve-timestamp="true"
local-directory="${ldir2}"
auto-create-local-directory="true"
temporary-file-suffix=".writing"
local-filter="localOnlyCsvFilter"
delete-remote-files="false"
local-filename-generator-expression="#this.toLowerCase()"
>
<int:poller fixed-rate="10000" max-messages-per-poll="-1" />
</int-sftp:inbound-channel-adapter>
每个过滤器都是一个复合过滤器,它包含一个FileSystemPersistentAcceptOnceFileListFilter和另一个过滤器,例如IgnoreHiddenFileListFilter和/或我的ExtensionFileListFilter,例如。
<bean id="localOnlyXmlFilter"
class="org.springframework.integration.file.filters.CompositeFileListFilter">
<constructor-arg>
<list>
<bean
class="org.springframework.integration.file.filters.IgnoreHiddenFileListFilter" />
<bean
class="uk.co.bigsoft.app.imports.filters.ExtensionFileListFilter">
<constructor-arg value="xml" />
</bean>
<bean
class="uk.co.bigsoft.app.imports.filters.PrefixFileListFilter">
<constructor-arg index="0" value="pref2_" />
</bean>
<bean class="org.springframework.integration.file.filters.FileSystemPersistentAcceptOnceFileListFilter">
<constructor-arg index="0" ref="localFileStore" />
<constructor-arg index="1" name="prefix" value="" />
<property name="flushOnUpdate" value="true" />
</bean>
</list>
</constructor-arg>
</bean>
<bean id="localOnlyCsvFilter"
class="org.springframework.integration.file.filters.CompositeFileListFilter">
<constructor-arg>
<list>
<bean
class="org.springframework.integration.file.filters.IgnoreHiddenFileListFilter" />
<bean
class="uk.co.bigsoft.app.imports.filters.ExtensionFileListFilter">
<constructor-arg value="csv" />
</bean>
<bean
class="uk.co.bigsoft.app.imports.filters.PrefixFileListFilter">
<constructor-arg index="0" value="pref1_" />
</bean>
<bean class="org.springframework.integration.file.filters.FileSystemPersistentAcceptOnceFileListFilter">
<constructor-arg index="0" ref="localFileStore" />
<constructor-arg index="1" name="prefix" value="" />
<property name="flushOnUpdate" value="true" />
</bean>
</list>
</constructor-arg>
</bean>
该文件下载正常,但取决于localOnlyXmlFilter或localOnlyCsvFilter是否先运行,第二次运行的文件不会看到它,因为它已经被首先运行的那个记住了!我想我真正想要的是本地过滤器沿着过滤器列表向下移动,当过滤器为假(或不返回任何条目)时停止而不是运行所有过滤器(这似乎是对我毫无意义。)
有什么能做到的吗?我一直在考虑重组过滤器,但我一直遇到问题。
public class StoppingCompositeFileFilter extends AbstractFileListFilter<File> {
private List<AbstractFileListFilter<File>> filters;
public StoppingCompositeFileFilter(List<AbstractFileListFilter<File>> filters) {
this.filters = filters;
}
@Override
protected boolean accept(File file) {
for (AbstractFileListFilter<File> filter : filters) {
--> // Fails to compile because accept() is abstract for AbstractFileListFilter
if (!filter.accept(file)) {
return false;
}
}
return true;
}
}
或者看起来过于复杂的那个:
class AnotherFilter implements FileListFilter<File> {
private List<FileListFilter<File>> filters;
@Override
public List<File> filterFiles(File[] files) {
List<File> keeping = new ArrayList<File>();
for (File file : files) {
for (FileListFilter<File> filter : filters) {
keeping = filter.filterFiles(keeping.toArray(new File[keeping.size()]));
if (keeping.size() == 0) {
return new ArrayList<File>();
}
}
}
return keeping;
}
}
答案 0 :(得分:1)
CompositeFileListFilter
逻辑如下:
public List<F> filterFiles(F[] files) {
Assert.notNull(files, "'files' should not be null");
List<F> results = new ArrayList<F>(Arrays.asList(files));
for (FileListFilter<F> fileFilter : this.fileFilters) {
List<F> currentResults = fileFilter.filterFiles(files);
results.retainAll(currentResults);
}
return results;
}
所以,我认为你应该根据现有算法构建自己的逻辑,而不是发明一个可能错误或足够复杂的新设计。
尚不确定您想要达到的目标,但在我看来,AcceptOnce
必须是列表中的第一个...